Title: Fast Sub-String Count (aka InStrCount)
Description: This function searches the passed string for occurences of the specified sub-string. It has the ability to make case-sensitive or case-insensitive searches. It can also perform whole-word-only matching ... 
This SubStrCount implementation offers extended functionality which allows it to be used in a similar way to other token style functions ... 
SubStrCount will return the number of matches or zero if none.

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