collocation

noun5

1. •
   The grouping or juxtaposition of things, especially words or sounds.

   • Everything in fact depends in Chinese on the proper collocation of words in a sentence. Thus ngò tà ni means “I beat thee;” but ni tà ngò would mean “Thou beatest me.” — 1869
2. •
   A sequence of words or terms that co-occur more often than would be expected by chance (i.e., the statistically significant placement of particular words in a language), often representing an established name for, or idiomatic way of conveying, a particular semantic concept.

   • Little and few are also incomplete negatives; note the frequent collocation with no: there is little or no danger. — 1917
3. •
   Such a specific grouping.
4. •
   A service allowing multiple customers to locate network, server, and storage gear and connect them to a variety of telecommunications and network service providers, at a minimum of cost and complexity.
5. •
   A method of finding an approximate solution of an ordinary differential equation L[y]=0 by determining coefficients in an expansion y(x)=y_0(x)+∑ₗ₌₀^qαₗy_l(x) so as to make L[y] vanish at prescribed points; the expansion with the coefficients thus found is the sought approximation.