Let's divide 380972 by 91
The aim is to understand the frequency of 91 in 380972.

Advancing to step 1:
91 can be fit into 3 0 times, resulting in a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Take the next digit (8) from the dividend and append it to 3, then repeat: 38 / 91

Let's proceed to step 2:
38 divided by 91 is 0 with a remainder of 38.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 38 leaves us with 38.
Append the next digit (0) from the dividend to 38 and continue with: 380 / 91

Going ahead to step 3:
When dividing 380 by 91, we get 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtract 364 from 380 to get 16.
Grab the next digit (9) from the dividend, add it to 16, then carry on: 169 / 91

Advancing to step 4:
If we divide 169 by 91, we get 1 and a remainder of 78.
Use 1 as the next digit of our solution. 
Result so far: 41.0
Subtract 91 from 169 to get 78.
Grab the next digit (7) from the dividend, add it to 78, then carry on: 787 / 91

On to step 5:
The number 91 fits into 787 8 times, leaving a remainder of 59.
Record the quotient 8 as the next digit in the result. 
Result so far: 418.0
The remainder is 59 after subtracting 728 from 787.
Include the next digit (2) from the dividend after 59, then repeat: 592 / 91

Advancing to step 6:
The number 91 fits into 592 6 times, leaving a remainder of 46.
Record the quotient 6 as the next digit in the result. 
Result so far: 4186.0
Deduct 546 from 592 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.

On to step 7:
91 can be fit into 460 5 times, resulting in a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 4186.5
If we subtract 455 from 460, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 8:
91 can be fit into 50 0 times, resulting in a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 4186.5
Deduct 0 from 50 and we're left 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.

Moving on to step 9:
When dividing 500 by 91, we get 5 with a remainder of 45.
The number 5 becomes the next digit in our result. 
Result so far: 4186.505
Subtract 455 from 500 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Moving on to step 10:
If we divide 450 by 91, we get 4 and a remainder of 86.
Put 4 as the next digit of the answer. 
Result so far: 4186.5054
Subtracting 364 from 450 leaves us with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Step 11:
If we divide 860 by 91, we get 9 and a remainder of 41.
Write down 9 as next digit of the result. 
Result so far: 4186.50549
Deduct 819 from 860 and we're left 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.

Advancing to step 12:
The number 91 fits into 410 4 times, leaving a remainder of 46.
Write down 4 as next digit of the result. 
Result so far: 4186.505494
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.

Step 13:
91 can be fit into 460 5 times, resulting in a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 4186.5054945
If we take 455 away from 460, we end up 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 14:
If we divide 50 by 91, we get 0 and a remainder of 50.
The next digit of our result is 0. 
Result so far: 4186.5054945
Subtract 0 from 50 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The quotient of the division is 4186.5054945, and the remainder is 5e-08.