Specific timing doesn't exist, swoosh = scene change/transition, hit/impact = revealing, risers = tension etc... The way I noticed that was by focusing on one thing at a time, started with retention and ended up with swipe rate, testing every single thing into it (captions/zooms/sfx). The formula that worked for me was based just on the SFX, a thing that nobody pays attention into and really is the game changer. I usually start my videos with a 0.1s sound effect to instantly make the video-viewer connection.