obliging vs solicitous

obliging

adj
  • Happy and ready to do favours for others. 

noun
  • The imposition of an obligation. 

solicitous

adj
  • In an eager way. 

  • In an anxious or distressed way. 

  • In a conscientious way, often with kindness. 

  • Disposed to solicit; eager to obtain something desirable, or to avoid anything evil. 

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