As needed... sometimes daily, sometimes not for days at a time. Most properties sell so quickly there's no ability to have "weekly" contact. Typically, after listing, there's more contact on all the activities that happen once a contract is signed and inspections take place. I don't believe in contacting just for the sake of saying I did. Most people are busy and they appreciate contact when needed but don't want gratuitous phone calls.

We set expectations at the time of listing and the contact flows accordingly. I have land listings I hold for years. Owner knows marketing plan, what I'm doing and when.
Others want continual updates. That's okay too! It's whatever WE decide.
Some don't want to hear a word unless there's a deal on the table.
(When I'm the seller and you're my listing agent, that's me.)

At least weekly but, recently, it's been hourly!!

At least once a week but as often as needed. I do like Mondays and Fridays even if no updates as an optimum plan

Once a week usually, sometimes every 14 days.

Like most things in real life(let alone real estate) the answer will vary based on the Individual situation.  Communication is discussed (including frequency and method at the onset of the listing).

My commitment is no less than once a week.  Reality is, in my hot fast-paced market, it can be every day for awhile ... then it tapers off until we close. Sellers are contacted as needed / when necessary.

What Scott Godzyk said. -Kasey

Ative seller-listings? Yes, regularly, consistently.

A minimum of once per week, or more depending on the activity and situation.  I provide them with a weekly update of activity and feedback when I get it.. but that's like pulling teeth.

It just depends. The one thing you should never do is never call. 

Minimum once a week... if the listing lasts that long.  ;0

what Nina Hollander said....

Unless something comes up that they need to know at least once a week.

As necessary depending on the client!

Depends.

At least weekly.

When needed

Every Monday I give them the good the bad and the ugly.

As often as possible so they know I am working hard tosell their home.

Minimum of once per week.  Certainly when there is an update.

Well, Praful Thakkar 

Many of our listings need to be prepared for the market: paint, flooring, counter tops, etc. We stay in frequent contact with the sellers to make sure they are in the loop as to timing and progress. When on the market, properties usually sell quickly. We give frequent updates re: showings, feedback and hand-holding (by phone or electronically). We know that the biggest, most frequent complaint from clients is regarding poor communication.

I have a rule of a minimum of once a week and encourage them to call or text me anytime, day or night, with questions or concerns.  I also thank them often for their trust and faith in choosing to work with me.

At least once a week, usually 2 or 3 times a week.

Weekly

It seems like it is daily, in this market.

It depends on the client.

Mininum every 4 days.......keeps me sharp and referrals flow in.....and a SOC gift every 10 days up to the closing.....

With our very brisk market, sometimes several times a day.

once a week for an update and more as needed for scheduling showings

Weekly at a minimum

Depends where we are in the transactions. But typically daily.

Depends where we are, if there are no important updates, 1/week.

Depends on how often the client wants it

On investors I have a quick send list that goes out every two weeks and sometimes every week.