He frequently exchanged ambassadors with the Kangxi Emperor from the mainland.

Mailing lists are the lifeblood of many nonprofit theater companies, and these groups frequently exchange lists among themselves.

The pool was formed by a community of cells that frequently exchanged genes by lateral transfer.

These two cave systems since early 2007 have been frequently exchanging the title as the longest underwater cave system in the world.

"Boris the Spider" frequently exchanged between the fourth and eighth slot.

Unlike the previous playoff matches, this game was hotly contested, with the teams frequently exchanging leads.

Early in the debate, there was general agreement among the contenders on a broad range of issues, and the candidates frequently exchanged compliments.

They frequently exchanged notes and from time to time Murasaki joined her in her games.

Team members can frequently exchange roles depending on their preferences.

In fact, he and I frequently exchanged items.