chord progressions - SERP Analysis

https://en.wikipedia.org/wiki/Chord_progression

https://online.berklee.edu/takenote/common-chord-progressions-and-how-to-make-them-your-own/

https://www.reddit.com/r/musictheory/comments/wr2wmy/encyclopedia_of_chord_progressions/

https://www.musicca.com/chord-player

https://www.justinguitar.com/guitar-lessons/5-common-chord-progressions-bg-1011

https://www.youtube.com/watch%3Fv%3D_yw85rAb6cw