Formula in Excel to count occurrences of substrings within strings

Question

I am trying to count the number of times a sub-string appears within a column of string data in Excel. Please see the below example.

The column of string data (tweet

Answer 1

You are nearly there, use

=COUNTIF(A:A, "*"&B1&"*")

Caveat:
This counts the number of cells in A:A that contain the string one or more times. It does not count the total number of instances of the string.

Answer 2

A very Simple Excel Solution for occurrence of x-string ("ABC") into y-string ("ABC 123 ABC 23dfABC"):

1. Identify length of y-string. Ly = len(y)
2. Substitute x-string by x1-string (append only 1 char of any supported character to x-string. e.g. "ABC"=> "ABC_" ) and calculate length of new string y1-string. Ly1 = len(substitute(y,x,x1)).
3. No of occurrence of x-string) in y-string = Ly1-Ly

Number of Occurrence: len(substitute(y,x,x1)) - len(y)

Nomenclature for Understanding: x-string: "ABC" x1-string: "ABC_" y-string: "ABC 123 ABC 23dfABC" y1-string: ""ABC_ 123 ABC_ 23dfABC_"