Counting jump(no of lines) between first two 'String' occurrences in a file

Question

I have a huge data file with a specific string being repeated after a defined number of lines.

counting jump between first two \'Rank\' occurrences. For example the file

Answer 1

7 line of codes:

count = 0
for line in open("yourfile.txt"):
    if "Rank" in line: 
        count += 1
        if count > 1: break 
    elif count > 0: count += 1
print count