We look at the division of 80599771 by 260 
The aim is to understand the frequency of 260 in 80599771.

Step 1:
If we divide 8 by 260, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 260

Going ahead to step 2:
260 can be fit into 80 0 times, resulting in a remainder of 80.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 80 to get 80.
Bring next digit (5) of the dividend behind the 80 and repeat the process: 805 / 260

Going ahead to step 3:
805 divided by 260 is 3 with a remainder of 25.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 780 from 805, we get 25.
Fetch the next digit (9) from the dividend, attach it to 25 and continue: 259 / 260

On to step 4:
When dividing 259 by 260, we get 0 with a remainder of 259.
The number 0 becomes the next digit in our result. 
Result so far: 30.0
If we subtract 0 from 259, we get 259.
Fetch the next digit (9) from the dividend, attach it to 259 and continue: 2599 / 260

Advancing to step 5:
The number 260 fits into 2599 9 times, leaving a remainder of 259.
Put 9 as the next digit of the answer. 
Result so far: 309.0
If we take 2340 away from 2599, we end up with 259.
Bring next digit (7) of the dividend behind the 259 and repeat the process: 2597 / 260

On to step 6:
If we divide 2597 by 260, we get 9 and a remainder of 257.
Put 9 as the next digit of the answer. 
Result so far: 3099.0
Deduct 2340 from 2597 and we're left with 257.
Grab the next digit (7) from the dividend, add it to 257, then carry on: 2577 / 260

Moving on to step 7:
When dividing 2577 by 260, we get 9 with a remainder of 237.
Record the quotient 9 as the next digit in the result. 
Result so far: 30999.0
If we take 2340 away from 2577, we end up with 237.
Bring next digit (1) of the dividend behind the 237 and repeat the process: 2371 / 260

Step 8:
260 can be fit into 2371 9 times, resulting in a remainder of 31.
Record the quotient 9 as the next digit in the result. 
Result so far: 309999.0
Subtracting 2340 from 2371 leaves us with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 9:
260 goes into 310 1 times with a remainder of 50.
Record the quotient 1 as the next digit in the result. 
Result so far: 309999.1
Subtracting 260 from 310 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 10:
If we divide 500 by 260, we get 1 and a remainder of 240.
The next digit of our result is 1. 
Result so far: 309999.11
Subtract 260 from 500 to get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

The quotient of the division is 309999.11, and the remainder is 0.24.