Replace hardcoded time units with named constants

[Minku-Koo]

• Replaced hardcoded time-related values with named constants.
• Facilitates easier adjustments of these values and reduces potential for errors.|

[codspeed-hq]

CodSpeed Performance Report

Merging #861 will not alter performance

_{Comparing Minku-Koo:devkoo (eee1ebc) with master (a21fc8d)}

Summary

✅ 1 untouched benchmarks

[Minku-Koo]

@Secrus plz check it

[Secrus]

Fix pre-commit checks, please.

[Minku-Koo]

I fix pre-commit, but there is some problem about rust.
In my changes, only python file is changed.

[Secrus]

Those issues are not present on the master branch, so I assume they are connected to your changes.

[Minku-Koo]

@Secrus I re-upload pull request same changes with #867