But in two of the adult chimps, there was just an overwhelming increase in the frequency of yawning".
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.
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.
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.
Although only 2.1 percentage points higher in absolute terms, this represents a 17 percent increase in the frequency of attempts.
"We are seeing a marked increase in the frequency of the transaction announcements and an increase in the size of transactions," Mark Weinberger, assistant secretary for tax policy, said today.
Religious sentiment was also on display, with a significant increase in the frequency of words like "Allah," "sacrifice" and "gospel".
This is important because we know that the first sign of developing resistance, in the 1990s and 2000s, to the older malaria drugs like chloroquine and sulphadoxine-pyrimethamine, was an increase in the frequency of mosquito infection after treatment.
