doubtfulness vs temporizing

doubtfulness

noun
  • The state or quality of being doubtful; doubt; uncertainty. 

temporizing

noun
  • The act of one who temporizes, or acts evasively. 

adj
  • Of or relating to temporization (in its various senses). 

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