The official definition of the word fretting is "be constantly or visibly worried or anxious."

Bummin' , fretting .

Gary W. Kirkpatrick has written:

'Fretting fatigue analysis and palliatives' -- subject(s): FATIGUE (MECHANICS), FRETTING

Fretting corrosion is a complex process which involve chemical corrosion and friction (by asperities, surface irregularities) between components in motion, fluids moving in tubes, etc.

Hozumi Goto has written:

'Effect of humidity on fretting wear of several pure metals' -- subject(s): Control, Fretting corrosion, Humidity