Hello?
hi what can I help you? how*
Hi.  My name is Joseph Banter. I have a question about this Calvin Klein jacket for $64. How often do I need to wash this item?
sure, I'll tell you the answers in a moment. Mr. Joseph

Ok it will depend on two scenario Mr. Joseph If you use it regularly I recommend that you wash it twice in the season.
ok
if you use it too little, wash it once per season.
Ok
any other questions Mr. joseph?
No that's it for today.  Thank you.
a pleasure to help you. have a nice day!