heed vs meditation

heed

noun
  • Careful attention. 

verb
  • To mind; to regard with care; to take notice of; to attend to; to observe. 

meditation

noun
  • Careful and thorough thought. 

  • A devotional exercise of, or leading to contemplation. 

  • A contemplative discourse, often on a religious or philosophical subject. 

  • A musical theme treated in a meditative manner. 

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