関連ワード:  python find occurrence of substring in string    python find count of substring in string    python find last occurrence of substring in string    python find first occurrence of substring in string    python find nth occurrence of substring in string    python find all occurrences of substring in string    python get count of substring in string    python find number of occurrences of substring in string    python find multiple instances of substring in string    python find last instance of substring in string  
結果 : python find occurrence of substring in string