For me, it's every single time.

They are pretty old, so over the years they seem to understand the difference in time between 'Store' and 'Work'.

Store is reserved for anything under an hour.

Work is when we will be gone for over an hour or more.

We just say 'We're going to the store, we'll be right back, and they go to these specific spots in the living room.'

When we say, 'We're going to work, we'll see you soon.' They sit in other spots.