self-assured vs selfsecure

self-assured

adj
  • confident in one's own abilities 

selfsecure

adj
  • Secure in oneself; self-assured; self-confident. 

  • Secure on one's own; self-reliant; self-sustaining. 

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