Finding the Occurrence of Character in String

DECLARE @LongSentence VARCHAR(MAX)
DECLARE @FindSubString VARCHAR(MAX)
SET @LongSentence = 'My Super Long String With Long Words'
SET @FindSubString = 'long'
SELECT (LEN(@LongSentence) - LEN(REPLACE(@LongSentence, @FindSubString, ''))) CntReplacedChars,
(LEN(@LongSentence) - LEN(REPLACE(@LongSentence, @FindSubString, '')))/LEN(@FindSubString) CntOccuranceChars

This will return following resultset.

CntReplacedChars     CntOccuranceChars
-------------------- --------------------
2                    2

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DECLARE @LongSentence VARCHAR(MAX)
DECLARE @FindSubString VARCHAR(MAX)
SET @LongSentence = 'My Super Long String With Long Words'
SET @FindSubString = 'o'
SELECT (LEN(@LongSentence) - LEN(REPLACE(@LongSentence, @FindSubString, ''))) CntReplacedChars,
(LEN(@LongSentence) - LEN(REPLACE(@LongSentence, @FindSubString, '')))/LEN(@FindSubString) CntOccuranceChars

This will return following resultset.

CntReplacedChars     CntOccuranceChars -------------------- -------------------- 3                    3