sparingly

According to Roberts, the United States needs to build up “the most lethal force in the world,” a force Roberts claims he would like to be “the most sparingly used.”

Israel only slowly and sparingly opens crossings into Gaza, an area sealed off from outside access.

He played sparingly as a true freshman, though coach Chip Kelly made sure to honor his family ties by getting him into one Pac-12 game — at Stanford.

“Wearing glasses that connect you to digital content, whether it’s AR or VR should be done sparingly for special experiences,” he said.

Such permission would only be "sparingly granted", said the Cabinet Office.