We're dividing 338776 by 91 
The aim is to understand the frequency of 91 in 338776.

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
Subtract 0 from 3 to get 3.
Grab the next digit (3) from the dividend, add it to 3, then carry on: 33 / 91

Let's proceed to step 2:
If we divide 33 by 91, we get 0 and a remainder of 33.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 33 after subtracting 0 from 33.
Grab the next digit (8) from the dividend, add it to 33, then carry on: 338 / 91

Going ahead to step 3:
338 divided by 91 is 3 with a remainder of 65.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 273 away from 338, we end up with 65.
Bring next digit (7) of the dividend behind the 65 and repeat the process: 657 / 91

Step 4:
When dividing 657 by 91, we get 7 with a remainder of 20.
Put 7 as the next digit of the answer. 
Result so far: 37.0
The remainder is 20 after subtracting 637 from 657.
Fetch the next digit (7) from the dividend, attach it to 20 and continue: 207 / 91

Step 5:
91 can be fit into 207 2 times, resulting in a remainder of 25.
The next digit of our result is 2. 
Result so far: 372.0
Subtract 182 from 207 to get 25.
Include the next digit (6) from the dividend after 25, then repeat: 256 / 91

On to step 6:
When dividing 256 by 91, we get 2 with a remainder of 74.
Put 2 as the next digit of the answer. 
Result so far: 3722.0
Subtracting 182 from 256 leaves us with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Let's proceed to step 7:
740 divided by 91 is 8 with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 3722.8
Subtract 728 from 740 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 8:
91 can be fit into 120 1 times, resulting in a remainder of 29.
Record the quotient 1 as the next digit in the result. 
Result so far: 3722.81
If we take 91 away from 120, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 9:
91 goes into 290 3 times with a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 3722.813
The remainder is 17 after subtracting 273 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 10:
170 divided by 91 is 1 with a remainder of 79.
Record the quotient 1 as the next digit in the result. 
Result so far: 3722.8131
Deduct 91 from 170 and we're left with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Moving on to step 11:
790 divided by 91 is 8 with a remainder of 62.
Write down 8 as next digit of the result. 
Result so far: 3722.81318
Deduct 728 from 790 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 12:
91 goes into 620 6 times with a remainder of 74.
Put 6 as the next digit of the answer. 
Result so far: 3722.813186
If we subtract 546 from 620, we get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Moving on to step 13:
740 divided by 91 is 8 with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 3722.8131868
If we subtract 728 from 740, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 14:
The number 91 fits into 120 1 times, leaving a remainder of 29.
The next digit of our result is 1. 
Result so far: 3722.81318681
Deduct 91 from 120 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

The final result is 3722.81318681 with a remainder of 2.9e-08.