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Rule "missing hyphen in '24 hour motel'"

This is one of many errors that LanguageTool can detect.

Description: missing hyphen in '24 hour motel'
Message: When '\1-\2' is used as a modifier, it is usually spelled with a hyphen.
Category: Grammar (ID: GRAMMAR)
Link: https://languagetool.org/insights/post/hyphen/#hyphenated-numbers-and-fractions-numerals
Incorrect sentences
that this rule can detect:
  • The 24 hour walmart never closes down.
    Correction suggestion: 24-hour
  • He was working six 12 hour days.
    Correction suggestion: 12-hour
  • 15 minute workout, starting at 6:30pm.
    Correction suggestion: 15-minute
Correct sentences
for comparison:
  • I bet you play one hour a day.
  • I exercise for 1 hour every day.
  • 5 hour per day gambling trip.
  • One hour of sleep before midnight is worth two hours after.
  • Conditioning: treadmill 10 minutes @ 3% incline - sprint @ 7 mph for 1 minute, walk @ 3 mph for 1 minute
  • If one assumes 24 hour/day operation for 360 days/year.
  • It is located one hour's drive from Barcelona.
ID: HOUR_HYPHEN [1]
Version: 6.6-SNAPSHOT (2024-11-25 22:33:08 +0100)