Let's divide 189641 by 91
The aim is to understand the frequency of 91 in 189641.

Going ahead to step 1:
If we divide 1 by 91, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 91

Advancing to step 2:
If we divide 18 by 91, we get 0 and a remainder of 18.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 18, we end up with 18.
Take the next digit (9) from the dividend and append it to 18, then repeat: 189 / 91

Advancing to step 3:
91 can be fit into 189 2 times, resulting in a remainder of 7.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 182 from 189, we get 7.
Grab the next digit (6) from the dividend, add it to 7, then carry on: 76 / 91

Advancing to step 4:
When dividing 76 by 91, we get 0 with a remainder of 76.
Put 0 as the next digit of the answer. 
Result so far: 20.0
Subtract 0 from 76 to get 76.
Append the next digit (4) from the dividend to 76 and continue with: 764 / 91

Going ahead to step 5:
When dividing 764 by 91, we get 8 with a remainder of 36.
The next digit of our result is 8. 
Result so far: 208.0
If we take 728 away from 764, we end up with 36.
Grab the next digit (1) from the dividend, add it to 36, then carry on: 361 / 91

Going ahead to step 6:
361 divided by 91 is 3 with a remainder of 88.
Write down 3 as next digit of the result. 
Result so far: 2083.0
If we take 273 away from 361, we end up with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Step 7:
When dividing 880 by 91, we get 9 with a remainder of 61.
Record the quotient 9 as the next digit in the result. 
Result so far: 2083.9
Subtract 819 from 880 to get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Advancing to step 8:
If we divide 610 by 91, we get 6 and a remainder of 64.
Put 6 as the next digit of the answer. 
Result so far: 2083.96
Deduct 546 from 610 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 9:
If we divide 640 by 91, we get 7 and a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 2083.967
If we subtract 637 from 640, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 10:
The number 91 fits into 30 0 times, leaving a remainder of 30.
The next digit of our result is 0. 
Result so far: 2083.967
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 11:
300 divided by 91 is 3 with a remainder of 27.
Record the quotient 3 as the next digit in the result. 
Result so far: 2083.96703
Subtracting 273 from 300 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 12:
91 goes into 270 2 times with a remainder of 88.
Record the quotient 2 as the next digit in the result. 
Result so far: 2083.967032
Subtract 182 from 270 to get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Advancing to step 13:
If we divide 880 by 91, we get 9 and a remainder of 61.
Record the quotient 9 as the next digit in the result. 
Result so far: 2083.9670329
Subtracting 819 from 880 leaves us with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Let's proceed to step 14:
91 goes into 610 6 times with a remainder of 64.
The next digit of our result is 6. 
Result so far: 2083.96703296
If we subtract 546 from 610, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The quotient of the division is 2083.96703296, and the remainder is 6.4e-08.