201873 ÷ 91 
The aim is to understand the frequency of 91 in 201873.

Let's proceed to step 1:
If we divide 2 by 91, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 91

Let's proceed to step 2:
If we divide 20 by 91, we get 0 and a remainder of 20.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 20 after subtracting 0 from 20.
Append the next digit (1) from the dividend to 20 and continue with: 201 / 91

Going ahead to step 3:
When dividing 201 by 91, we get 2 with a remainder of 19.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 182 from 201 to get 19.
Append the next digit (8) from the dividend to 19 and continue with: 198 / 91

Advancing to step 4:
When dividing 198 by 91, we get 2 with a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 22.0
If we take 182 away from 198, we end up with 16.
Take the next digit (7) from the dividend and append it to 16, then repeat: 167 / 91

Moving on to step 5:
If we divide 167 by 91, we get 1 and a remainder of 76.
Record the quotient 1 as the next digit in the result. 
Result so far: 221.0
Subtract 91 from 167 to get 76.
Fetch the next digit (3) from the dividend, attach it to 76 and continue: 763 / 91

Let's proceed to step 6:
If we divide 763 by 91, we get 8 and a remainder of 35.
Put 8 as the next digit of the answer. 
Result so far: 2218.0
Subtract 728 from 763 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 7:
When dividing 350 by 91, we get 3 with a remainder of 77.
Write down 3 as next digit of the result. 
Result so far: 2218.3
If we take 273 away from 350, we end up with 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 8:
770 divided by 91 is 8 with a remainder of 42.
Use 8 as the next digit of our solution. 
Result so far: 2218.38
The remainder is 42 after subtracting 728 from 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 9:
91 can be fit into 420 4 times, resulting in a remainder of 56.
The number 4 becomes the next digit in our result. 
Result so far: 2218.384
Subtract 364 from 420 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 10:
91 can be fit into 560 6 times, resulting in a remainder of 14.
Put 6 as the next digit of the answer. 
Result so far: 2218.3846
The remainder is 14 after subtracting 546 from 560.
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 11:
140 divided by 91 is 1 with a remainder of 49.
Record the quotient 1 as the next digit in the result. 
Result so far: 2218.38461
Subtracting 91 from 140 leaves us 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.

Moving on to step 12:
The number 91 fits into 490 5 times, leaving a remainder of 35.
Write down 5 as next digit of the result. 
Result so far: 2218.384615
Subtract 455 from 490 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 13:
91 can be fit into 350 3 times, resulting in a remainder of 77.
Put 3 as the next digit of the answer. 
Result so far: 2218.3846153
Subtracting 273 from 350 leaves us with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Going ahead to step 14:
When dividing 770 by 91, we get 8 with a remainder of 42.
Put 8 as the next digit of the answer. 
Result so far: 2218.38461538
If we take 728 away from 770, we end up 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.

After the division, we end up with 2218.38461538 and a remainder of 4.2e-08.