pretension vs self-obsession

pretension

noun
  • Pretentiousness. 

  • A claim or aspiration to a particular status or quality. 

verb
  • To apply tension to reinforcing strands before concrete is poured in. 

  • To apply tension to an object before some other event or process. 

self-obsession

noun
  • preoccupation with self; egocentrism; selfishness 

How often have the words pretension and self-obsession occurred in a corpus of books? (source: Google Ngram Viewer )