When someone says "age gap" do they mean like 20 and 22 or 20 and 53?

Mostly two people are not of same age has different ages that's conclude as age gap

2nd or 10<age gap

Usually age gaps are talking abt an age gap of a few years since the words age gap could literally be anything like a gap of a few minutes to a few decades
Generally i assume around 5+ years but it all depends on who you're talking to tbh and what they consider an age gap or not (it also depends if u say just age gap or large age gap, for me a regular age gap is like 5+ yrs but a large age gap is like 10-15+ yrs)