How to calculate the amount of time it will take to complete an action?

Question

Game development

Example 1: Screenshot from 7.62
Example 2: Screenshot from 7.62
The action and the time in seconds are shown under the cursor.
There are no problems with movement, because. I know the unit's distance and speed.
And how to calculate the time that will be spent on aiming, shooting and working with inventory?

Answer 1

And how to calculate the time that will be spent on aiming, shooting and working with inventory?

Animation duration and distance between the hero and the target / bullet speed.