it's a pleasure vs sure thing

it's a pleasure

phrase

  • Polite reaction after receiving thanks. 

sure thing

intj

  • An affirmative reply; yes; certainly. 

  • A polite reply to thank you. 

noun

  • That which is certain. 

How often have the words it's a pleasure and sure thing occurred in a corpus of books? (source: Google Ngram Viewer )