advise of

I think inform suits the place
I think you mean something like this:

Could you please inform us about when you are available for us and your professional charges?

I have no opinion about to advise of but this is what English Prepositional Idioms by Frederick T Wood says about it:

Advise one of something (inform one of something) has become firmly fixed in commercial jargon (e.g. 'We write to advise you of the despatch of the goods on your order of yesterday's date'). It should be avoided.

CB

Cool BreezeAdvise one of something (inform one of something) has become firmly fixed in commercial jargon (e.g. 'We write to advise you of the despatch of the goods on your order of yesterday's date'). It should be avoided.

I usually dislike business jargon, but I actually find this use of "advise" quite tolerable. I guess opinions vary.

Thank you for your comments, GPY and CB.

GPY,
Would you say 'advise on' is better in the original sentence? How would you have written it?
Thanks

AnonymousGPY,Would you say 'advise on' is better in the original sentence? How would you have written it?Thanks

"advise on" sounds to me as if you actually want advice about something (in the sense of a recommendation about what to do). It doesn't seem to fit the context. "advise of" essentially just means "inform of/about". As I said, I don't have a problem w