sincere vs trusty

sincere

adj
  • Meant truly or earnestly. 

  • Genuine; meaning what one says or does; heartfelt. 

trusty

adj
  • Reliable or trustworthy. 

noun
  • A trusted person, especially a prisoner who has been granted special privileges. 

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