echoic vs secondhand

echoic

adj
  • Of or pertaining to an echo 

  • Imitative of a sound; onomatopoeic. 

secondhand

adj
  • Indirect; from a secondary source; not firsthand. 

  • inhaled from the air near someone else smoking. 

  • Not new; previously owned and used by another. 

  • Dealing in such merchandise. 

noun
  • Secondhand goods (especially clothes) collectively. 

adv
  • In a used or previously-owned condition. 

  • indirectly 

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