by and by vs eternal now

by and by

noun
  • Heaven; the hereafter. Usually preceded with "the sweet." 

adv
  • After a short time. 

  • After an indefinite period. 

eternal now

noun
  • The nature of God's existence which is outside of time; the nature of a soul's existence in a supposed timeless afterlife. 

  • The condition in which all reality is experienced in the present, with the past contained only in memory and the future only in anticipation or speculation. 

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