We look at the division of 72210080 by 851 
The aim is to understand the frequency of 851 in 72210080.

On to step 1:
7 divided by 851 is 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 851

Let's proceed to step 2:
851 can be fit into 72 0 times, resulting in a remainder of 72.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 72 after subtracting 0 from 72.
Bring next digit (2) of the dividend behind the 72 and repeat the process: 722 / 851

Going ahead to step 3:
851 can be fit into 722 0 times, resulting in a remainder of 722.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 722 to get 722.
Grab the next digit (1) from the dividend, add it to 722, then carry on: 7221 / 851

Going ahead to step 4:
851 can be fit into 7221 8 times, resulting in a remainder of 413.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Subtracting 6808 from 7221 leaves us with 413.
Fetch the next digit (0) from the dividend, attach it to 413 and continue: 4130 / 851

Going ahead to step 5:
4130 divided by 851 is 4 with a remainder of 726.
The next digit of our result is 4. 
Result so far: 84.0
Deduct 3404 from 4130 and we're left with 726.
Fetch the next digit (0) from the dividend, attach it to 726 and continue: 7260 / 851

Let's proceed to step 6:
851 can be fit into 7260 8 times, resulting in a remainder of 452.
The number 8 becomes the next digit in our result. 
Result so far: 848.0
If we subtract 6808 from 7260, we get 452.
Grab the next digit (8) from the dividend, add it to 452, then carry on: 4528 / 851

Going ahead to step 7:
If we divide 4528 by 851, we get 5 and a remainder of 273.
Record the quotient 5 as the next digit in the result. 
Result so far: 8485.0
If we subtract 4255 from 4528, we get 273.
Fetch the next digit (0) from the dividend, attach it to 273 and continue: 2730 / 851

Advancing to step 8:
851 can be fit into 2730 3 times, resulting in a remainder of 177.
Record the quotient 3 as the next digit in the result. 
Result so far: 84853.0
If we take 2553 away from 2730, we end up with 177.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1770, and continue the process.

Going ahead to step 9:
If we divide 1770 by 851, we get 2 and a remainder of 68.
Write down 2 as next digit of the result. 
Result so far: 84853.2
Subtract 1702 from 1770 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

On to step 10:
680 divided by 851 is 0 with a remainder of 680.
The next digit of our result is 0. 
Result so far: 84853.2
Subtract 0 from 680 to get 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

Moving on to step 11:
851 goes into 6800 7 times with a remainder of 843.
Record the quotient 7 as the next digit in the result. 
Result so far: 84853.207
Subtracting 5957 from 6800 leaves us with 843.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8430, and continue the process.

Moving on to step 12:
When dividing 8430 by 851, we get 9 with a remainder of 771.
Use 9 as the next digit of our solution. 
Result so far: 84853.2079
Subtract 7659 from 8430 to get 771.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7710, and continue the process.

Advancing to step 13:
851 can be fit into 7710 9 times, resulting in a remainder of 51.
The number 9 becomes the next digit in our result. 
Result so far: 84853.20799
The remainder is 51 after subtracting 7659 from 7710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

The final result is 84853.20799 with a remainder of 5.1e-05.