We divide 680017 by 91
The aim is to understand the frequency of 91 in 680017.

Step 1:
If we divide 6 by 91, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (8) from the dividend, add it to 6, then carry on: 68 / 91

Step 2:
68 divided by 91 is 0 with a remainder of 68.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 68, we end up with 68.
Append the next digit (0) from the dividend to 68 and continue with: 680 / 91

On to step 3:
If we divide 680 by 91, we get 7 and a remainder of 43.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtracting 637 from 680 leaves us with 43.
Append the next digit (0) from the dividend to 43 and continue with: 430 / 91

Moving on to step 4:
430 divided by 91 is 4 with a remainder of 66.
The number 4 becomes the next digit in our result. 
Result so far: 74.0
Subtract 364 from 430 to get 66.
Grab the next digit (1) from the dividend, add it to 66, then carry on: 661 / 91

Step 5:
When dividing 661 by 91, we get 7 with a remainder of 24.
The next digit of our result is 7. 
Result so far: 747.0
Subtract 637 from 661 to get 24.
Append the next digit (7) from the dividend to 24 and continue with: 247 / 91

Going ahead to step 6:
If we divide 247 by 91, we get 2 and a remainder of 65.
The next digit of our result is 2. 
Result so far: 7472.0
If we take 182 away from 247, we end up with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

On to step 7:
The number 91 fits into 650 7 times, leaving a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 7472.7
If we take 637 away from 650, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 8:
91 can be fit into 130 1 times, resulting in a remainder of 39.
The next digit of our result is 1. 
Result so far: 7472.71
The remainder is 39 after subtracting 91 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 9:
91 can be fit into 390 4 times, resulting in a remainder of 26.
Record the quotient 4 as the next digit in the result. 
Result so far: 7472.714
If we subtract 364 from 390, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 10:
91 goes into 260 2 times with a remainder of 78.
Put 2 as the next digit of the answer. 
Result so far: 7472.7142
The remainder is 78 after subtracting 182 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Step 11:
91 can be fit into 780 8 times, resulting in a remainder of 52.
The next digit of our result is 8. 
Result so far: 7472.71428
Subtracting 728 from 780 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 12:
The number 91 fits into 520 5 times, leaving a remainder of 65.
Use 5 as the next digit of our solution. 
Result so far: 7472.714285
Subtracting 455 from 520 leaves us with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Let's proceed to step 13:
The number 91 fits into 650 7 times, leaving a remainder of 13.
The next digit of our result is 7. 
Result so far: 7472.7142857
If we take 637 away from 650, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 14:
130 divided by 91 is 1 with a remainder of 39.
Write down 1 as next digit of the result. 
Result so far: 7472.71428571
The remainder is 39 after subtracting 91 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

The quotient of the division is 7472.71428571, and the remainder is 3.9e-08.