"Fretting" often refers to the frets and/or their system of placement. He is constantly fretting himself about her fidelity. Fretting wear is the repeated cyclical rubbing between two surfaces. Chicago punks Screeching Weasel as much as they do the emotional fretting of the Descendents. Furthermore, he used the injured fingers predominantly for fretting chords rather than single-note solos. When the guitar is strummed without fretting any strings, a C-major chord is sounded. This lack of backlash also reduces wear due to fretting. Another problem occurs when cracks in either surface are created, known as fretting fatigue. It takes several months to stop fretting about it and move on. This can result in "fretting fatigue", whereby fatigue cracks can initiate in the fretting zone. Fretting corrosion acts in the same way, especially when water is present. Lap joints, common on airframe surfaces, are a prime location for fretting corrosion. The body extends the length of the fingerboard, and its fretting is generally diatonic. The distinction between false brinelling and fretting corrosion has been extensively discussed in the literature. This is also known as frettage or fretting corrosion.