In other words, they are "filling in" under-utilized "vacant" lots in an urbanized setting.
It took six months until he made his next first team appearance, filling in at right back in a 5-0 home victory over Sunderland.
A man she barely knew, a Maquis named Evans, was now filling in in Ops.
Hagan played a role filling in for Lamb in Canterbury's upset win in the 1985 grand final.
Eddie Stratton is currently filling in on drums with his friends in New Disease.
These works were chosen to "fill in the gaps" in the existing collection so that it would span his entire body of work from the 1960s until 2005.
I was filling in in the Washington Bureau a couple of years ago.
They are simply filling in gaps in the knowledge obtained from the others of us whom they have already copied and questioned.
He had to stop, his imagination filling in gaps in the crowds that scurried to and fro like so many black-clad ants.
"The rate issue is a blank that needed filling in in anybody's offer," he said.