M, due to its proximity to A*, will also increase in frequency.

It has dramatically increased in frequency between 1960 and 2010 by 30 fold.

Some kinds of cancer that were expected to increase in frequency have not.

The song is a series of whistles which increase in speed and frequency.

"They've increased in frequency until now they come less than an hour apart."

These complications can increase in severity and frequency with long term use.

Many such mutations increased in frequency by natural selection until all members of the species had them.

The number of strange events begins to increase in frequency and danger.

The word "shot" continued to directly assault my nervous system as it seemed to increase in frequency.

As the century progressed these books increased in size, popularity and frequency.