We look at the division of 90704514 by 851 
The aim is to understand the frequency of 851 in 90704514.

Going ahead to step 1:
When dividing 9 by 851, we get 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 851

On to step 2:
851 goes into 90 0 times with a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 90, we get 90.
Include the next digit (7) from the dividend after 90, then repeat: 907 / 851

Let's proceed to step 3:
The number 851 fits into 907 1 times, leaving a remainder of 56.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 851 from 907 leaves us with 56.
Take the next digit (0) from the dividend and append it to 56, then repeat: 560 / 851

Let's proceed to step 4:
When dividing 560 by 851, we get 0 with a remainder of 560.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Deduct 0 from 560 and we're left with 560.
Bring next digit (4) of the dividend behind the 560 and repeat the process: 5604 / 851

Moving on to step 5:
851 can be fit into 5604 6 times, resulting in a remainder of 498.
The number 6 becomes the next digit in our result. 
Result so far: 106.0
Subtracting 5106 from 5604 leaves us with 498.
Take the next digit (5) from the dividend and append it to 498, then repeat: 4985 / 851

Step 6:
If we divide 4985 by 851, we get 5 and a remainder of 730.
Use 5 as the next digit of our solution. 
Result so far: 1065.0
The remainder is 730 after subtracting 4255 from 4985.
Include the next digit (1) from the dividend after 730, then repeat: 7301 / 851

Advancing to step 7:
If we divide 7301 by 851, we get 8 and a remainder of 493.
Put 8 as the next digit of the answer. 
Result so far: 10658.0
Deduct 6808 from 7301 and we're left with 493.
Take the next digit (4) from the dividend and append it to 493, then repeat: 4934 / 851

Going ahead to step 8:
When dividing 4934 by 851, we get 5 with a remainder of 679.
Use 5 as the next digit of our solution. 
Result so far: 106585.0
The remainder is 679 after subtracting 4255 from 4934.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6790, and continue the process.

Going ahead to step 9:
6790 divided by 851 is 7 with a remainder of 833.
Record the quotient 7 as the next digit in the result. 
Result so far: 106585.7
Subtracting 5957 from 6790 leaves us with 833.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8330, and continue the process.

Let's proceed to step 10:
When dividing 8330 by 851, we get 9 with a remainder of 671.
The number 9 becomes the next digit in our result. 
Result so far: 106585.79
Deduct 7659 from 8330 and we're left with 671.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6710, and continue the process.

Step 11:
When dividing 6710 by 851, we get 7 with a remainder of 753.
Use 7 as the next digit of our solution. 
Result so far: 106585.797
If we subtract 5957 from 6710, we get 753.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7530, and continue the process.

Going ahead to step 12:
If we divide 7530 by 851, we get 8 and a remainder of 722.
The number 8 becomes the next digit in our result. 
Result so far: 106585.7978
The remainder is 722 after subtracting 6808 from 7530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7220, and continue the process.

Advancing to step 13:
7220 divided by 851 is 8 with a remainder of 412.
Record the quotient 8 as the next digit in the result. 
Result so far: 106585.79788
The remainder is 412 after subtracting 6808 from 7220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4120, and continue the process.

The final outcome is 106585.79788, with a leftover of 0.000412.