passing thought

It was a sad face when in repose, yet wonderfully responsive to every passing thought and mood.

He did not even give a passing thought as to how much or how little she knew of his sad story.

Next morning came the usual short impatient scrawl on thin blue paper from Edward, scarce worthy of a passing thought.

To him the months passed quickly, and happy in the present he gave but now and then a passing thought to the future.

Tishy cannot help a passing thought on the oddity of her parents' relations to one another.