ago
a little while ago

browse
...for a while

cat
while the cat's away, the mice will play

cover for
I covered for him while he was ill

going
while the going is good

hay
to make hay while the sun shines

in
in a little while

iron
to strike while the iron is hot

little
a little while

officiate
he officiated for me while I was absent

once
once in a while / once in a way

pick up
...a little while ago?

place
while that was taking place

see after
...the children while you go shopping

stand in
she stood in for me while I was ill

strike
strike while the iron is hot

while
while in London she attended a few classes