self-centeredness vs solipsism

self-centeredness

noun
  • The state, quality, or condition of being self-centered; concern only for oneself 

solipsism

noun
  • Self-absorption, an unawareness of the views or needs of others; self-centeredness; egoism. 

  • The idea that the self is all that exists or that can be proven to exist. 

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