"Sure," she said, looking after Gwen with a thoughtful frown.

His thoughtful frown made it clear that he was not quite satisfied with the outcome.

But the services he'd performed so far had all been small potatoes beside tonight, and his smile became a thoughtful frown.

She was looking at the third Jeep, though, her face set into a thoughtful frown.

She gave it back to him with a thoughtful little frown.

"I'm beginning to wonder why we haven't heard from them," he said with a thoughtful frown.

He sat looking down at it with a thoughtful frown.

Tom hung up the phone and returned to the others with a thoughtful frown.

But then the smile faded, replaced by a thoughtful frown, as he considered the report.

His thoughtful frown told that he was weighing the idea.