Recent function logic

Hey guys
I want to understand the Recent function logic. Maybe with an example, it would help.

recent[5](close[1] < lower BBand)

I want to know what it returns. Is it simply a 1:0 true/false if the above is true in the last 5 bars? Is it returning how many bars back when it was true? Is it returning how many times it was true?

As always ~ thanks for the continued product support for many years.

I am checking with our dev team to be sure, I will let you know