関連ワード:  dataframe count of unique values in column    pandas count of unique values in column    dataframe number of unique values in column    pandas dataframe count of unique values in column    pandas number of unique values in column    pandas count of distinct values in column    pandas dataframe count number of unique values in column    pandas get count of unique values in column    pandas count occurrences of unique values in column    pandas count frequency of unique values in column  
結果 : dataframe count of unique values in column