How long is the wait period for inheritance in California?

How long does it take the exector to write the check,

How large is the estate, is it being contested, are there debtors,
Far to complicated iwthout more details

What does it say in the will? If a trust was created it could be years away depending on how it is written.

An extremely simple small estate might squeak in at 2 months in some cases. Most take several months to a year, if in the mid range, with a house and a bank account, a boilerplate will, and no debts crawling out of the woodwork. Property and assets in other states or abroad, or a complicated will, or people who can't be located, possibly 2 years. You should get notices from the probate court and executor as steps are taken.