Series.str.count(pat, flags=0, **kwargs) Count occurrences of pattern in each string of the Series/Index.
| Parameters: |
pat : string, valid regular expression flags : int, default 0 (no flags) re module flags, e.g. re.IGNORECASE |
|---|---|
| Returns: |
counts : Series/Index of integer values |
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http://pandas.pydata.org/pandas-docs/version/0.18.1/generated/pandas.Series.str.count.html