Guitar Sequence is a term used to describe the order of notes played on a guitar. The two crossword solutions for this term are Frets (5 letters) and Riff (4 letters). Frets are the metal strips along the neck of a guitar that divide the strings into different notes. A Riff is a short, catchy phrase that is repeated throughout a song. It is usually composed of several notes and chords and is often used as an introduction or chorus.