Electronics don't really need to be replaced often so once in a while.

When the current product is out of commission beyond repair

It is mostly a year or whenever the item is spoiled etc.

Only if there is a need or existing one is spoiled

Usually only when something needs to be replaced

There’s usually something in need every month

Whenever there’s sth cool or if we need sth.

Depending on wear and tear but usually yearly.

Once every few months, only when I need it

Whenever the appliance needs replacement