block out vs shroud

block out

verb
  • to cover something, so as to make it impossible to see. 

  • to prevent from entering or penetrating. 

  • to prevent (a thought) from entering one's mind. 

  • to begin to reduce to shape; to mark out roughly; to lay out. 

shroud

verb
  • To conceal or hide from view, as if by a shroud. 

  • To cover with a shroud. 

  • To take shelter or harbour. 

  • To lop the branches from (a tree). 

noun
  • That which clothes, covers, conceals, or protects; a garment. 

  • One of the two annular plates at the periphery of a water wheel, which form the sides of the buckets; a shroud plate. 

  • The branching top of a tree; foliage. 

  • One of a set of ropes or cables (rigging) attaching a mast to the sides of a vessel or to another anchor point, serving to support the mast sideways; such rigging collectively. 

  • A covered place used as a retreat or shelter, as a cave or den; also, a vault or crypt. 

  • That which covers or shelters like a shroud. 

  • A streamlined protective covering used to protect the payload during a rocket-powered launch. 

  • Especially, the dress for the dead; a winding sheet. 

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