375370 ÷ 91 
The aim is to understand the frequency of 91 in 375370.

Moving on to step 1:
91 can be fit into 3 0 times, resulting in a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Fetch the next digit (7) from the dividend, attach it to 3 and continue: 37 / 91

Step 2:
91 goes into 37 0 times with a remainder of 37.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 37, we end up with 37.
Fetch the next digit (5) from the dividend, attach it to 37 and continue: 375 / 91

On to step 3:
If we divide 375 by 91, we get 4 and a remainder of 11.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we subtract 364 from 375, we get 11.
Bring next digit (3) of the dividend behind the 11 and repeat the process: 113 / 91

Step 4:
113 divided by 91 is 1 with a remainder of 22.
Write down 1 as next digit of the result. 
Result so far: 41.0
Subtracting 91 from 113 leaves us with 22.
Fetch the next digit (7) from the dividend, attach it to 22 and continue: 227 / 91

Going ahead to step 5:
The number 91 fits into 227 2 times, leaving a remainder of 45.
Record the quotient 2 as the next digit in the result. 
Result so far: 412.0
The remainder is 45 after subtracting 182 from 227.
Include the next digit (0) from the dividend after 45, then repeat: 450 / 91

Step 6:
If we divide 450 by 91, we get 4 and a remainder of 86.
Write down 4 as next digit of the result. 
Result so far: 4124.0
If we subtract 364 from 450, we get 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

On to step 7:
When dividing 860 by 91, we get 9 with a remainder of 41.
Write down 9 as next digit of the result. 
Result so far: 4124.9
The remainder is 41 after subtracting 819 from 860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Let's proceed to step 8:
91 can be fit into 410 4 times, resulting in a remainder of 46.
Record the quotient 4 as the next digit in the result. 
Result so far: 4124.94
The remainder is 46 after subtracting 364 from 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Let's proceed to step 9:
91 can be fit into 460 5 times, resulting in a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 4124.945
Deduct 455 from 460 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 10:
If we divide 50 by 91, we get 0 and a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 4124.945
If we take 0 away from 50, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 11:
91 can be fit into 500 5 times, resulting in a remainder of 45.
The number 5 becomes the next digit in our result. 
Result so far: 4124.94505
The remainder is 45 after subtracting 455 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Let's proceed to step 12:
When dividing 450 by 91, we get 4 with a remainder of 86.
The next digit of our result is 4. 
Result so far: 4124.945054
The remainder is 86 after subtracting 364 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Step 13:
When dividing 860 by 91, we get 9 with a remainder of 41.
The next digit of our result is 9. 
Result so far: 4124.9450549
Subtracting 819 from 860 leaves us with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Moving on to step 14:
The number 91 fits into 410 4 times, leaving a remainder of 46.
Put 4 as the next digit of the answer. 
Result so far: 4124.94505494
Deduct 364 from 410 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

The final outcome is 4124.94505494, with a leftover of 4.6e-08.