for the birds vs unappropriate

for the birds

adj

  • Worthless; useless; pointless; not deserving serious consideration. 

unappropriate

adj

  • Inappropriate; unsuitable. 

verb

  • To take from private possession; to restore to the possession or right of all. 

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