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Mathematica > String Operations >

StringCount

StringCount["string", "sub"]
gives a count of the number of times "sub" appears as a substring of "string".

StringCount["string", patt]
gives the number of substrings in "string" that match the general string expression patt.

StringCount["string", {patt₁, patt₂, ...}]
counts the number of occurrences of any of the patt_i.

StringCount[{s₁, s₂, ...}, p]
gives the list of results for each of the s_i.

The string expression patt can contain any of the objects specified in the notes for StringExpression.

With the default option setting Overlaps->False overlapping substrings are not treated as separate. With the setting Overlaps->True, StringCount counts substrings that overlap as separate.

With Overlaps->All, multiple substrings that match the same string expression are all counted as separate. With Overlaps->True, only the first such matching substring at a given position is counted as separate.