pamphlet vs treeware

pamphlet

noun
  • A small, brief printed work, consisting either of a folded sheet of paper, or several sheets bound together into a booklet with only a paper cover, formerly containing literary compositions, newsletters, and newspapers, but now chiefly informational matter. 

  • Such a work containing political material or discussing matters of controversy. 

verb
  • To distribute pamphlets (to someone or some place). 

  • To distribute pamphlets. 

treeware

noun
  • Documentation provided on paper. 

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