from the heart vs heart and soul

from the heart

adv

  • sincerely 

  • passionately 

heart and soul

adv

  • With the utmost earnestness. 

noun

  • the core of a thing; the most essential or important part 

  • passion; true commitment 

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