Question: complete this in Python please Write a function that find the frequency occurrence of a letter in a sentence. The function should return an integer.
complete this in Python please

Write a function that find the frequency occurrence of a letter in a sentence. The function should return an integer. (Do not use the str.count() default python function) Examples: find frequency("t", "this is a test") 3 find-frequency("y", "this is a test') 0
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