Let's divide 875658 by 91
The aim is to understand the frequency of 91 in 875658.

Advancing to step 1:
91 can be fit into 8 0 times, resulting in a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 91

Advancing to step 2:
When dividing 87 by 91, we get 0 with a remainder of 87.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 87 leaves us with 87.
Bring next digit (5) of the dividend behind the 87 and repeat the process: 875 / 91

Let's proceed to step 3:
91 can be fit into 875 9 times, resulting in a remainder of 56.
Put 9 as the next digit of the answer. 
Result so far: 9.0
If we take 819 away from 875, we end up with 56.
Fetch the next digit (6) from the dividend, attach it to 56 and continue: 566 / 91

Step 4:
If we divide 566 by 91, we get 6 and a remainder of 20.
Record the quotient 6 as the next digit in the result. 
Result so far: 96.0
The remainder is 20 after subtracting 546 from 566.
Include the next digit (5) from the dividend after 20, then repeat: 205 / 91

Going ahead to step 5:
91 can be fit into 205 2 times, resulting in a remainder of 23.
The next digit of our result is 2. 
Result so far: 962.0
Deduct 182 from 205 and we're left with 23.
Append the next digit (8) from the dividend to 23 and continue with: 238 / 91

Going ahead to step 6:
When dividing 238 by 91, we get 2 with a remainder of 56.
Write down 2 as next digit of the result. 
Result so far: 9622.0
Subtracting 182 from 238 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 7:
The number 91 fits into 560 6 times, leaving a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 9622.6
If we subtract 546 from 560, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 8:
140 divided by 91 is 1 with a remainder of 49.
The next digit of our result is 1. 
Result so far: 9622.61
If we take 91 away from 140, we end up with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

On to step 9:
490 divided by 91 is 5 with a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 9622.615
Deduct 455 from 490 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 10:
If we divide 350 by 91, we get 3 and a remainder of 77.
The number 3 becomes the next digit in our result. 
Result so far: 9622.6153
If we subtract 273 from 350, we get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Moving on to step 11:
770 divided by 91 is 8 with a remainder of 42.
The next digit of our result is 8. 
Result so far: 9622.61538
Deduct 728 from 770 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 12:
91 goes into 420 4 times with a remainder of 56.
The number 4 becomes the next digit in our result. 
Result so far: 9622.615384
Subtracting 364 from 420 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 13:
560 divided by 91 is 6 with a remainder of 14.
Use 6 as the next digit of our solution. 
Result so far: 9622.6153846
Subtracting 546 from 560 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 14:
91 can be fit into 140 1 times, resulting in a remainder of 49.
Put 1 as the next digit of the answer. 
Result so far: 9622.61538461
Deduct 91 from 140 and we're left with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

The final outcome is 9622.61538461, with a leftover of 4.9e-08.