sixpence vs valuable

sixpence

noun
  • A former British coin worth sixpence, first minted in 1551. 

valuable

noun
  • A personal possession such as jewellery, of relatively great monetary value. 

adj
  • Having a great value. 

  • Estimable; deserving esteem. 

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