Method # 1: Using count()
This is a fairly simple method that accomplishes this task. It just counts the occurrence of substrings in the string that we pass as an argument.

# Python3 code to demonstrate how it works # Frequency of substring in a string # Using count ()    # initialization string test_str = " Python.Engineering is for Geeks "    # substring initialization test_sub = "Geeks"     # print the original string print ( "The original string is:" + test_str)   # print substring print ( "The original substring:" + test_sub)   # using count () # Frequency of substring in a string res = test_str.count (test_sub)   # print result print ( "The frequency of substring in string is" + str (res))

Output:

 The original string is: Python.Engineering is for Geeks The original substring: Geeks The frequency of substring in string is 3 

Method # 2: Using len () + split ()
A combination of the above functions can be used to completing this task. This is done in 2 steps, in the first step we split the string into a list by substring and then count the elements that are 1 more than the required value.

# Python3 code for demonstrations # Frequency of substring in a string # Using split () + len ()   # initialization string test_str = "Python.Engineering is for Geeks"   # substring initialization test_sub = "Geeks"     # print original string print ( "The original string is: " + test_str)    # print substring print ( " The original substring: " + test_sub)   # using split () + len () # Frequency of substring in a string res = len (test_str.split (test_sub)) - 1   #result print print ( "The frequency of substring in string is " + str (res))

Output:

 The original string is: Python.Engineering is for Geeks The original substring: Geeks The frequency of substring in string is 3