At the end of a new piece of BiBiC hackery (I won't link to it because it is the same old same old, sort of stuff), they issue this addendum:

"Correction 5 March: An earlier version of this story said Israel had bombed Hamas for more than three years. This has been changed to two years."

I think it's been a bit longer than that! Definitely since 2006 and possibly as far back as the First Intifada and most definitely since 2006!

BiBiC:
How depleted weapons stockpiles could affect the Iran conflict