reverberation vs silver lining

reverberation

noun
  • An evolving series of effects resulting from a particular event; a repercussion. 

  • The reflection of light or heat; a reflection in, or as though in, a mirror. 

  • An echo, or a series of overlapping echoes. 

  • A violent oscillation or vibration. 

silver lining

noun
  • A good aspect of a mostly bad event. 

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