fragile vs tenacious

fragile

noun
  • Something that is fragile. 

adj
  • Easily broken or destroyed, and thus often of subtle or intricate structure. 

  • Feeling weak or easily disturbed as a result of illness. 

  • Thin-skinned or oversensitive. 

tenacious

adj
  • Unwilling to yield or give up; dogged. 

  • Having a good memory; retentive. 

  • Holding together; cohesive. 

  • Clinging to an object or surface; adhesive. 

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