CF: Board should meet "regularly" - but what is regularly?

In the question I am looking at (reading 31, page 231, #19) the board meets for the first time in six months… and this is an example of “corporate governance that AMC’s board of directors failed to meet.” what is “regularly”

it says quarterly at the least…and more frequently if conditions warrant them.

don’t have the reading in front of me, but recall somewhere that good practice is quarterly. Can anyone confirm. Maybe this was question-specific?

I’m going with quarterly, thanks for the responses

Annual is mim but prefer to meet quarter or more if needed.

So if its semi annually its not considered regularly?