We look at the division of 470677 by 91 
The aim is to understand the frequency of 91 in 470677.

Going ahead to step 1:
91 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Grab the next digit (7) from the dividend, add it to 4, then carry on: 47 / 91

Advancing to step 2:
The number 91 fits into 47 0 times, leaving a remainder of 47.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 47, we end up with 47.
Grab the next digit (0) from the dividend, add it to 47, then carry on: 470 / 91

Advancing to step 3:
470 divided by 91 is 5 with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtract 455 from 470 to get 15.
Include the next digit (6) from the dividend after 15, then repeat: 156 / 91

Step 4:
91 goes into 156 1 times with a remainder of 65.
Record the quotient 1 as the next digit in the result. 
Result so far: 51.0
If we subtract 91 from 156, we get 65.
Include the next digit (7) from the dividend after 65, then repeat: 657 / 91

Going ahead to step 5:
657 divided by 91 is 7 with a remainder of 20.
Use 7 as the next digit of our solution. 
Result so far: 517.0
Subtracting 637 from 657 leaves us with 20.
Take the next digit (7) from the dividend and append it to 20, then repeat: 207 / 91

Step 6:
When dividing 207 by 91, we get 2 with a remainder of 25.
The next digit of our result is 2. 
Result so far: 5172.0
If we subtract 182 from 207, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 7:
If we divide 250 by 91, we get 2 and a remainder of 68.
Put 2 as the next digit of the answer. 
Result so far: 5172.2
Deduct 182 from 250 and we're left with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Going ahead to step 8:
The number 91 fits into 680 7 times, leaving a remainder of 43.
Use 7 as the next digit of our solution. 
Result so far: 5172.27
Subtract 637 from 680 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Moving on to step 9:
When dividing 430 by 91, we get 4 with a remainder of 66.
Write down 4 as next digit of the result. 
Result so far: 5172.274
If we subtract 364 from 430, we get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 10:
660 divided by 91 is 7 with a remainder of 23.
Write down 7 as next digit of the result. 
Result so far: 5172.2747
Subtract 637 from 660 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Advancing to step 11:
91 can be fit into 230 2 times, resulting in a remainder of 48.
The next digit of our result is 2. 
Result so far: 5172.27472
Subtracting 182 from 230 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 12:
91 goes into 480 5 times with a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 5172.274725
Subtracting 455 from 480 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 13:
91 goes into 250 2 times with a remainder of 68.
Record the quotient 2 as the next digit in the result. 
Result so far: 5172.2747252
Subtract 182 from 250 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 14:
91 goes into 680 7 times with a remainder of 43.
Put 7 as the next digit of the answer. 
Result so far: 5172.27472527
Subtracting 637 from 680 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

The final result is 5172.27472527 with a remainder of 4.3e-08.