1. A computer-implemented method comprising: identifying two or more consecutive terms in a search query; determining a first quantity of search results that (i) are responsive to the search query, and (ii) have been selected by a user; determining a second quantity of search results that (i) are responsive to the search query, (ii) have been selected by the user, and (iii) have summaries that include the two or more consecutive terms; determining a value using the first quantity and the second quantity; and determining a likelihood that the two or more consecutive terms represent a compound based on the value.
1. A computer-implemented method comprising: identifying two or more consecutive terms in a search query; determining a first quantity of search results that (i) are responsive to the search query, and (ii) have been selected by a user; determining a second quantity of search results that (i) are responsive to the search query, (ii) have been selected by the user, and (iii) have summaries that include the two or more consecutive terms; determining a value using the first quantity and the second quantity; and determining a likelihood that the two or more consecutive terms represent a compound based on the value. 5. The method of claim 1 , wherein a compound is a combination of terms that has a different meaning in combination than the terms do separately.