The source of frustration and anxiety for so many Americans today is that they simply expect too much.

It is a source of tremendous frustration that we didn't spend more time with her.

He said his latest setback has not been a source of frustration.

However, it is often a source of frustration during baseball season.

This has been a source of deep frustration to many writers.

For many with disabilities, this is a great source of frustration.

For the police, it was a source of endless frustration.

That gap in our history is a source of great pain and frustration.

The unit, however, remained outside the state line organization, a source of great frustration for its officers.

The brain, though, has long been a special source of frustration.