UNIX for Beginners Questions & Answers

Suppose I have a word which is repeating in a string continuously. I have a set of intervals. Then how do I find the number occurrences of that word in those intervals and their location of occurrences. For example - Suppose there is a huge string anfie.......sirn of 10000 letters. Now the word "good" occurs at many places. I have intervals like 1-101, 132-251,.... like this. I want to find how many time "good" occurs in these intervals and where.

Please get accustomed to posting requests or specifications as detailed and exact as possible, by supplying system information, sample input data, preferred tools, desired output, and maybe more.
In above, where and how is the "string" stored? A shell variable? A file? One line or multiple lines? A structure used in an e.g. c- program?
What to do with the results? Print them? Store them? Process them?

Input

Code:

AHSDGJOGDXBSAJVDGJDSVKKBDAZZGJJVD(the string)

D (the letter or a string to be searched)

Code:

0-5 7-14 20-30 35-41(the intervals)

Output

Code:

1(Freq of D) 4(location)
1 8
2 15,18
1 24
1 41

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