Let's divide 912905 by 91
The aim is to understand the frequency of 91 in 912905.

Let's proceed to step 1:
91 can be fit into 9 0 times, resulting in a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 91

Going ahead to step 2:
91 goes into 91 1 times with a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 91 away from 91, we end up with 0.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 91

Advancing to step 3:
When dividing 2 by 91, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtract 0 from 2 to get 2.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 91

Moving on to step 4:
91 can be fit into 29 0 times, resulting in a remainder of 29.
Record the quotient 0 as the next digit in the result. 
Result so far: 100.0
If we subtract 0 from 29, we get 29.
Include the next digit (0) from the dividend after 29, then repeat: 290 / 91

On to step 5:
91 goes into 290 3 times with a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 1003.0
If we subtract 273 from 290, we get 17.
Take the next digit (5) from the dividend and append it to 17, then repeat: 175 / 91

Let's proceed to step 6:
91 goes into 175 1 times with a remainder of 84.
Record the quotient 1 as the next digit in the result. 
Result so far: 10031.0
If we subtract 91 from 175, we get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

On to step 7:
The number 91 fits into 840 9 times, leaving a remainder of 21.
Record the quotient 9 as the next digit in the result. 
Result so far: 10031.9
Deduct 819 from 840 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 8:
If we divide 210 by 91, we get 2 and a remainder of 28.
Record the quotient 2 as the next digit in the result. 
Result so far: 10031.92
Subtracting 182 from 210 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 9:
280 divided by 91 is 3 with a remainder of 7.
The next digit of our result is 3. 
Result so far: 10031.923
If we take 273 away from 280, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 10:
The number 91 fits into 70 0 times, leaving a remainder of 70.
The next digit of our result is 0. 
Result so far: 10031.923
Deduct 0 from 70 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 11:
91 goes into 700 7 times with a remainder of 63.
The number 7 becomes the next digit in our result. 
Result so far: 10031.92307
Subtract 637 from 700 to get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Advancing to step 12:
If we divide 630 by 91, we get 6 and a remainder of 84.
Use 6 as the next digit of our solution. 
Result so far: 10031.923076
Subtracting 546 from 630 leaves us with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Let's proceed to step 13:
840 divided by 91 is 9 with a remainder of 21.
Put 9 as the next digit of the answer. 
Result so far: 10031.9230769
If we take 819 away from 840, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 14:
If we divide 210 by 91, we get 2 and a remainder of 28.
Record the quotient 2 as the next digit in the result. 
Result so far: 10031.92307692
Subtracting 182 from 210 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

After the division, we end up with 10031.92307692 and a remainder of 2.8e-08.