90420659 divided by 691 
The aim is to understand the frequency of 691 in 90420659.

Going ahead to step 1:
9 divided by 691 is 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 691

On to step 2:
If we divide 90 by 691, we get 0 and a remainder of 90.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 90, we end up with 90.
Take the next digit (4) from the dividend and append it to 90, then repeat: 904 / 691

On to step 3:
If we divide 904 by 691, we get 1 and a remainder of 213.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 691 from 904 and we're left with 213.
Take the next digit (2) from the dividend and append it to 213, then repeat: 2132 / 691

Step 4:
691 can be fit into 2132 3 times, resulting in a remainder of 59.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
If we take 2073 away from 2132, we end up with 59.
Grab the next digit (0) from the dividend, add it to 59, then carry on: 590 / 691

Advancing to step 5:
691 goes into 590 0 times with a remainder of 590.
The number 0 becomes the next digit in our result. 
Result so far: 130.0
Subtracting 0 from 590 leaves us with 590.
Fetch the next digit (6) from the dividend, attach it to 590 and continue: 5906 / 691

Let's proceed to step 6:
691 can be fit into 5906 8 times, resulting in a remainder of 378.
Write down 8 as next digit of the result. 
Result so far: 1308.0
Subtract 5528 from 5906 to get 378.
Bring next digit (5) of the dividend behind the 378 and repeat the process: 3785 / 691

Step 7:
691 can be fit into 3785 5 times, resulting in a remainder of 330.
Write down 5 as next digit of the result. 
Result so far: 13085.0
The remainder is 330 after subtracting 3455 from 3785.
Include the next digit (9) from the dividend after 330, then repeat: 3309 / 691

Going ahead to step 8:
691 can be fit into 3309 4 times, resulting in a remainder of 545.
The number 4 becomes the next digit in our result. 
Result so far: 130854.0
Subtract 2764 from 3309 to get 545.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5450, and continue the process.

Let's proceed to step 9:
691 goes into 5450 7 times with a remainder of 613.
Record the quotient 7 as the next digit in the result. 
Result so far: 130854.7
If we subtract 4837 from 5450, we get 613.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6130, and continue the process.

On to step 10:
If we divide 6130 by 691, we get 8 and a remainder of 602.
Use 8 as the next digit of our solution. 
Result so far: 130854.78
Subtracting 5528 from 6130 leaves us with 602.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6020, and continue the process.

Going ahead to step 11:
691 can be fit into 6020 8 times, resulting in a remainder of 492.
The number 8 becomes the next digit in our result. 
Result so far: 130854.788
The remainder is 492 after subtracting 5528 from 6020.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4920, and continue the process.

The quotient of the division is 130854.788, and the remainder is 0.0492.