Every 2-3 days of no changes or updates, otherwise, I'll contact them as soon as it possible. 

As needed and as desired by my client. There is no "one size fits all" aspect to my dealings with either buyers or sellers.

A LOT! There is nothing worse than being an anxious seller and not getting updates or feedback from the listing agent.

On a regular mutually agreed basis.

I always try to call them before they feel the need to call me.

hopefully daily to let them knew they have another showing :)

not often. Most moved away and most do not ans when I mail....

Each client has different needs and expectations.  This is something discussed at signing and thankfully, the majority of my Sellers are very experienced and realistic.  Not a lot of hand holding required.

I stay in touch often. 

Weekly unless there is a need.

Many like to hear from me by email or text so I regularly am in contact..each one if different. I stay in touch several times a week on an average!

My goal is to update them Monday and Friday or when needed if there is a showing or question for them to address

Not as often as I should.

After taking a listing you should follow with seller every other week.

We call our sellers every single Thursday, whether we have news or not. We also ramp up those calls with more frequency once the property is under contract and headed to close. This does not count the calls my assistant makes as well. 

I used to call every Monday or email with updates, but now I contact them as soon as needed throughout the transaction. 

Anthony - At the very least once a week, as well as any time I have information to present to them, or need them to answer a question or fill out a form. Sometimes it could be several times a day.

Anthony,
We tend to get a lot of showings and contracts fairly quickly so usually we are talking daily.

Minimum once a week

Updates as needed and regular progress reports.

Weekly if not more often...

The expectation is established during the listing appointment.  

It varies.  I send them feedback as soon as I get it.  Then touch base as needed.

At least once a week...