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Computer programming languages utilize string functions to manipulate strings and to obtain data about strings (some do both). Although there might be additional low-level ways within each language to handle strings directly, the majority of programming languages that support the string datatype will contain some string functions.What is a string and what does it do?Computer programming languages utilize string functions to manipulate strings and to obtain data about strings (some do both). Although there might be additional low-level ways within each language to handle strings directly, the majority of programming languages that support the string datatype will contain some string functions.The program keeps track of how many times an alphabet appears in a given sentence or user-supplied word. The software was made using Python 3 as follows:user input = input("Enter the phrase: ");requests input from the userUser input = char to count[0]Since it is the first letter in the input string, #subset the letter to count.user input[1:] word =The word is #subsetWord.count(char to count) = num countsUsing the count function, determine how many times each letter of the alphabet appears.If word has char to count:#verify that the character being counted is present in the wordprint(num counts)#show the frequency of occurrenceelse :print(0)Print 0 if #ifit doesn't happen.To learn more about String function refer to:https://brainly.com/question/25324400#SPJ4