out of use vs unoccupied

out of use

prep
  • in disuse; no longer used 

unoccupied

adj
  • Not occupied by foreign troops etc 

  • Not being used; vacant or free 

  • Not inhabited, especially by a tenant 

  • Not employed on a task; idle 

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