Grammar and mechanics · mechanical
GRM-06
Hyphenate number-unit compound modifiers before nouns. The unit takes singular form when hyphenated.
Pass example
Start your 30-day free trial. | We offer a 2-hour workshop. | It's a one-time offer.
Fail example
Start your 30 day free trial. | We offer a 2 hours workshop. | It's a one time offer.