concentration vs lump

concentration

noun
  • The proportion of a substance in a whole. 

  • The act, process or product of reducing the volume of a liquid, as by evaporation. 

  • The act or process of removing the dress of ore and of reducing the valuable part to smaller compass, as by currents of air or water. 

  • The direction of attention to a specific object. 

  • A field or course of study on which one focuses, especially as a student in a college or university. 

  • The amount of solute in a solution measured in suitable units (e.g., parts per million (ppm)) 

  • The matching game pelmanism. 

lump

noun
  • A group, set, or unit. 

  • A swelling or nodule of tissue under the skin or in an internal part of the body. 

  • A small, shaped mass of sugar, typically about a teaspoonful. 

  • A dull or lazy person. 

  • A beating or verbal abuse. 

  • A projection beneath the breech end of a gun barrel. 

  • A kind of fish, the lumpsucker. 

  • Something that protrudes, sticks out, or sticks together; a cluster or blob; a mound or mass of no particular shape. 

verb
  • To treat as a single unit; to group together in a casual or chaotic manner (as if forming an ill-defined lump of the items). 

  • To bear (a heavy or awkward burden); to carry (something unwieldy) from one place to another. 

  • To hit or strike (a person). 

  • To burden (someone) with an undesired task or responsibility. 

  • To form a lump or lumps. 

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