Companion

A century, which is 100 years, or 1200 months.

A calendar day.

An hour, which is 60 minutes, or 3600 seconds.

A microsecond, which is 1/1_000_000 of a second, or 1_000 nanoseconds.

A millisecond, which is 1/1_000 of a second, or 1_000_000 nanoseconds.

A minute, which is 60 seconds.

A month.

A nanosecond, which is 1/1_000_000_000 of a second.

A quarter, which is three months.

A second.

A week, which is 7 calendar days.

A year, which is 12 months.