harm vs wear and tear

harm

noun
  • That which causes injury, damage, or loss. 

  • detriment; misfortune. 

  • physical injury; hurt; damage 

  • emotional or figurative hurt 

verb
  • To cause injury to another; to hurt; to cause damage to something. 

wear and tear

noun
  • Damage or depreciation resulting from ordinary use (normally as something excluded from a guarantee or warranty of quality, or as justifying a write-down in a set of accounts). 

How often have the words harm and wear and tear occurred in a corpus of books? (source: Google Ngram Viewer )