Answer:
The program written in python is as follows
def countchr(phrase, char):
      count = 0
      for i in range(len(phrase)):
            if phrase[i] == char:
                  count = count + 1
      return count
phrase = input("Enter a Phrase: ")
char = input("Enter a character: ")
print("Occurence: ",countchr(phrase,char))
Explanation:
To answer this question, I made use of function
This line defines function countchr
def countchr(phrase, char):
This line initializes count to 0
      count = 0
This line iterates through each character of input phrase
      for i in range(len(phrase)):
This line checks if current character equals input character
            if phrase[i] == char:
The count variable is incremented, if the above condition is true
                  count = count + 1
The total number of occurrence is returned using this line
      return count
The main method starts here; This line prompts user for phrase
phrase = input("Enter a Phrase: ")
This line prompts user for a character
char = input("Enter a character: ")
This line prints the number of occurrence of the input charcater in the input phrase
print("Occurence: ",countchr(phrase,char))