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Rule "Missing hyphens in '5 year old'"

This is one of many errors that LanguageTool can detect. Visit the LanguageTool homepage to use it online or download it for free.

Description: Missing hyphens in '5 year old'
Message: It seems that hyphens are missing.
Category: Punctuation (ID: PUNCTUATION)
Link: https://languagetool.org/insights/post/hyphen/#hyphenated-numbers-and-fractions-numerals
Incorrect sentences
that this rule can detect:
  • All five year olds were preparing for pre-school.
    Correction suggestion: five-year-olds
Correct sentences
for comparison:
  • It is almost 1 year old.
  • The fluid is less than 1 year old and looks and smells normal.
  • One year old at most.
Pattern: Show XML · Show in Rule Editor
Check the following text against just this rule:

ID: YEAR_OLD_HYPHEN [1]
Version: 6.0-SNAPSHOT (2022-11-28 21:33:02 +0000)