Idiom Help

[stevenagy]

I'm sure LJ can answer this better than I can by myself. I've already attempted a Google search and didn't find quite what I wanted to find. Or thought I wanted to find.

There's an expression that goes something like "now and then and ..."

I can't remember what comes after that. My mind keeps supplying "every point in between" as an answer, but I want to make sure.