Adding Fractional Seconds in Time Values?

[Mats]

I was asked if I could help my daughter's track and field club organize a database with all the results throughout the club's history. My response was of course: I'll fix it with PW. 
After digging into the subject a bit, I realize that I will need "Fractional Seconds in Time Values" for the race results. 
Is this something that could be added to the date/time field type or is it better to create a separate field type for this purpose?

https://w3c.github.io/opentrack-cg/spec/model/#time

https://dev.mysql.com/doc/refman/8.4/en/fractional-seconds.html

[Mats]

I found @netcarver's module PW-FieldtypeTime. I'll see if it's possible to extend the functionality of the module.

[netcarver]

Although I never thought of this use-case, it should be possible as the module uses (IIRC) the MySQL Time type which does have fractional second support.