I want to use excel to count a special word in a string in a excel cell. For example, one cell is:

[{age: 42, 'gender': 'Male', 'Rectangle': {'left': 132}}, {age: 48, 'gender': 'Male', Rectangle': {'left': 426}}, {age: 27, 'gender': 'Male', 'Rectangle': {'left': 275}}]

I want to count the number of word "age". The answer in upper example is 3.

Imagin the next cell is [{'age': 44, 'gender': 'Male', 'Rectangle': {'left': 134}}. Number of word "age" in this cell is one.

I want to do this for all the cells in a column. Could you please help me which formula I can use to find the number of word "age" in excel?