“Level playing field”

“Once in a blue moon”

Very rarely.

“Kill two birds with one stone”

To achieve two goals with one action.

“Better late than never”

Doing something late is better than not doing it at all.

“A blessing in disguise”

Something that seems bad but turns out good.

“Wrap one's head around something”

To understand something complicated.

“Burn the midnight oil”

To work late into the night.

“Cut corners”

To do something cheaply or badly to save time or money.

“Time flies”

Time passes very quickly.