We divide 210353 by 91
The aim is to understand the frequency of 91 in 210353.

Step 1:
The number 91 fits into 2 0 times, leaving a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 91

Going ahead to step 2:
91 goes into 21 0 times with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Take the next digit (0) from the dividend and append it to 21, then repeat: 210 / 91

Going ahead to step 3:
If we divide 210 by 91, we get 2 and a remainder of 28.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 182 from 210 to get 28.
Fetch the next digit (3) from the dividend, attach it to 28 and continue: 283 / 91

Going ahead to step 4:
When dividing 283 by 91, we get 3 with a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
If we subtract 273 from 283, we get 10.
Bring next digit (5) of the dividend behind the 10 and repeat the process: 105 / 91

Let's proceed to step 5:
91 goes into 105 1 times with a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 231.0
If we take 91 away from 105, we end up with 14.
Append the next digit (3) from the dividend to 14 and continue with: 143 / 91

Step 6:
When dividing 143 by 91, we get 1 with a remainder of 52.
Record the quotient 1 as the next digit in the result. 
Result so far: 2311.0
The remainder is 52 after subtracting 91 from 143.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Let's proceed to step 7:
The number 91 fits into 520 5 times, leaving a remainder of 65.
Record the quotient 5 as the next digit in the result. 
Result so far: 2311.5
The remainder is 65 after subtracting 455 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

On to step 8:
91 can be fit into 650 7 times, resulting in a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 2311.57
Subtracting 637 from 650 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 9:
91 goes into 130 1 times with a remainder of 39.
The number 1 becomes the next digit in our result. 
Result so far: 2311.571
Subtracting 91 from 130 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Let's proceed to step 10:
If we divide 390 by 91, we get 4 and a remainder of 26.
Write down 4 as next digit of the result. 
Result so far: 2311.5714
The remainder is 26 after subtracting 364 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 11:
91 goes into 260 2 times with a remainder of 78.
Write down 2 as next digit of the result. 
Result so far: 2311.57142
The remainder is 78 after subtracting 182 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Moving on to step 12:
91 can be fit into 780 8 times, resulting in a remainder of 52.
Write down 8 as next digit of the result. 
Result so far: 2311.571428
Subtracting 728 from 780 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 13:
When dividing 520 by 91, we get 5 with a remainder of 65.
Use 5 as the next digit of our solution. 
Result so far: 2311.5714285
Subtract 455 from 520 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Going ahead to step 14:
91 goes into 650 7 times with a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 2311.57142857
Subtract 637 from 650 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

The final outcome is 2311.57142857, with a leftover of 1.3e-08.