option to define zoom level for 'zoom on frame'

Hi,

in timeline there are shortcut-options for zoom in/out  in timeline. While editing I often have to check things with a closer look whithin my timeline. So I zoom in/out - 3x keystrokes in, than check, than 3x keystrokes out.

Alternatives are 'zoom on frame' ( 1x keystroke) and sometimes in reverse usage 'zoom to sequence' (1x keystroke).

Zoom on frame is for my needs to close in most cases. That again results in multiple keystrokes - 'Z' /zoom on frame (1x keystroke) and then zoom out (1x - 2x keystrokes). So no real efficiency here.

My request would be to have an option to define the zoom level for 'zoom on frame' for example in preferences. So that this shortcut has a custom predefined behaviour and could save me many many keystrokes a day.

What do you think about it?