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Changes in usage of terms over time can also present problems.

As a result there has been a significant increase in usage.

But the word is very much alive in American usage.

The increase in usage was reported as having gone from 1,300,000 to 2,200,000.

The term does not appear to be in common usage as of 2008.

My first principle in usage has been, simply, to make the story clear.

However, sources suggest the name was already in common usage by 1810 or even earlier.

This represents a 100%+ increase in usage, two years running.

Since the late 1960s, various other terms have been more widespread in popular usage.

In common usage, these terms are simple forms of abuse.