chary vs vigilant

chary

adj
  • Careful, cautious, shy, wary. 

  • Not disposed to give freely; not lavish; frugal, sparing. 

  • Excessively particular or fussy about details; fastidious. 

adv
  • Synonym of charily: carefully, cautiously, warily. 

vigilant

adj
  • Watchful, especially for danger or disorder; alert; wary 

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