letting vs restrictive

letting

noun
  • Hyponyms: sublease, underlease, subtenancy, undertenancy, subletting, underletting, (informal) sublet, underlet 

  • Synonym of tenancy. 

restrictive

adj
  • limiting free and easy bodily movement. 

  • Confining, limiting, containing within defined bounds. 

noun
  • A clause that narrows the meaning of a noun or noun phrase. 

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