Judson climbed the stairs three at a time, maddened almost beyond sense.

He was climbing the steps two at a time.

I climbed one step at a time, and I told myself to stay focused.

She was climbing out of the pit, an inch at a time.

He was climbing out of a well, a few inches at a time.

He didn't wait for an answer, climbing the steps slowly, one at a time.

Shenk was on the basement stairs, climbing two at a time.

She climbed down the ladder, one ponderous step at a time.

He gained a reputation as a master teacher, with enrollments in his classes climbing over 500 at a time.