Most employers in my experience want the detail of what you were doing. They don’t like 2 year blanks.

Having multiple jobs in a few years doesn’t show you are unreliable at all. There could be a number of reasons (short contracts, change of ownership, company closing, moving house, having kids, conditions changing) that forced your move.

I’ve got jobs in the past because my CV showed I was able and willing to take jobs when opportunities came my way.