To measure time, we use what are called customary units of measurement. For example, to measure time, we use seconds, minutes, hours, days, weeks, months, and years, and so on.
It's important to understand that the units of time are all related to each other.
For example, 60 seconds = 1 minute, 60 minutes = 1 hour, 24 hours = 1 day, 7 days = 1 week, 52 weeks = 1 year, and 12 months = 1 year. These equivalencies are called conversion factors because they're used to convert from one unit of measurement to another.