Origin of collocation
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a grouping together of things in a certain order, as of the words in a sentence
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
mid-15c., from Latin collocationem (nominative collocatio), noun of action from past participle stem of collocare (see collocate). Linguistics sense is attested from 1940.
Online Etymology Dictionary, © 2010 Douglas Harper