Matched context for often and rarely

The page lists matched contexts for often and rarely.

Share - often	Share - rarely	Phrase
5.86%	19.55%	{often or rarely} [temporal] use
2.29%	35.40%	{often or rarely} necessary
1.95%	19.22%	{often or rarely} [temporal] occur
0.64%	25.81%	{often or rarely} [temporal] exceed