But in two of the adult chimps, there was just an overwhelming increase in the frequency of yawning".
But we are seeing an increase in the frequency of these large scale events.
Technological progress appears to have contributed to an increase in the frequency of strikes.
With climate experts predicting an increase in the frequency of droughts, policymakers and business leaders are searching for innovative ways to cope.
Just three months later, it announced a further increase in the frequency of 30-year bond auctions, to 12 a year.
What remains controversial, however, is whether that demographic's burgeoning clout can be linked to the also undeniable increase in the frequency of "La Nina" years.
Although only 2.1 percentage points higher in absolute terms, this represents a 17 percent increase in the frequency of attempts.
Religious sentiment was also on display, with a significant increase in the frequency of words like "Allah," "sacrifice" and "gospel".
There has been an exponential increase in the frequency of immune deviations in young children.
Records exhibit a threefold increase in the frequency of fish kill incidents (Fig. 13).
The country has been experiencing an increase in the frequency of power cuts over the last ten years.
