We divide 388992 by 91
The aim is to understand the frequency of 91 in 388992.

On to step 1:
91 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Fetch the next digit (8) from the dividend, attach it to 3 and continue: 38 / 91

Going ahead to step 2:
91 can be fit into 38 0 times, resulting in a remainder of 38.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 38 leaves us with 38.
Grab the next digit (8) from the dividend, add it to 38, then carry on: 388 / 91

Going ahead to step 3:
The number 91 fits into 388 4 times, leaving a remainder of 24.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 24 after subtracting 364 from 388.
Append the next digit (9) from the dividend to 24 and continue with: 249 / 91

Let's proceed to step 4:
If we divide 249 by 91, we get 2 and a remainder of 67.
Use 2 as the next digit of our solution. 
Result so far: 42.0
Subtract 182 from 249 to get 67.
Grab the next digit (9) from the dividend, add it to 67, then carry on: 679 / 91

On to step 5:
679 divided by 91 is 7 with a remainder of 42.
Put 7 as the next digit of the answer. 
Result so far: 427.0
If we take 637 away from 679, we end up with 42.
Bring next digit (2) of the dividend behind the 42 and repeat the process: 422 / 91

Step 6:
When dividing 422 by 91, we get 4 with a remainder of 58.
Record the quotient 4 as the next digit in the result. 
Result so far: 4274.0
If we take 364 away from 422, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 7:
When dividing 580 by 91, we get 6 with a remainder of 34.
Put 6 as the next digit of the answer. 
Result so far: 4274.6
If we take 546 away from 580, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 8:
91 can be fit into 340 3 times, resulting in a remainder of 67.
The next digit of our result is 3. 
Result so far: 4274.63
If we subtract 273 from 340, we get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Going ahead to step 9:
91 can be fit into 670 7 times, resulting in a remainder of 33.
The next digit of our result is 7. 
Result so far: 4274.637
Subtracting 637 from 670 leaves us with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 10:
When dividing 330 by 91, we get 3 with a remainder of 57.
Record the quotient 3 as the next digit in the result. 
Result so far: 4274.6373
If we subtract 273 from 330, we get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Going ahead to step 11:
570 divided by 91 is 6 with a remainder of 24.
Use 6 as the next digit of our solution. 
Result so far: 4274.63736
Subtract 546 from 570 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 12:
91 goes into 240 2 times with a remainder of 58.
Use 2 as the next digit of our solution. 
Result so far: 4274.637362
Subtract 182 from 240 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Let's proceed to step 13:
580 divided by 91 is 6 with a remainder of 34.
Write down 6 as next digit of the result. 
Result so far: 4274.6373626
If we subtract 546 from 580, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 14:
The number 91 fits into 340 3 times, leaving a remainder of 67.
Put 3 as the next digit of the answer. 
Result so far: 4274.63736263
Subtracting 273 from 340 leaves us with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Our division results in 4274.63736263 with a remaining 6.7e-08.