We divide 91004 by 39
The aim is to understand the frequency of 39 in 91004.

Advancing to step 1:
The number 39 fits into 9 0 times, leaving a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 39

Step 2:
If we divide 91 by 39, we get 2 and a remainder of 13.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 78 from 91 to get 13.
Include the next digit (0) from the dividend after 13, then repeat: 130 / 39

Going ahead to step 3:
If we divide 130 by 39, we get 3 and a remainder of 13.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
Subtract 117 from 130 to get 13.
Include the next digit (0) from the dividend after 13, then repeat: 130 / 39

Advancing to step 4:
When dividing 130 by 39, we get 3 with a remainder of 13.
Put 3 as the next digit of the answer. 
Result so far: 233.0
Subtract 117 from 130 to get 13.
Take the next digit (4) from the dividend and append it to 13, then repeat: 134 / 39

On to step 5:
134 divided by 39 is 3 with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 2333.0
Subtract 117 from 134 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 6:
When dividing 170 by 39, we get 4 with a remainder of 14.
The number 4 becomes the next digit in our result. 
Result so far: 2333.4
If we take 156 away from 170, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 7:
140 divided by 39 is 3 with a remainder of 23.
Use 3 as the next digit of our solution. 
Result so far: 2333.43
Deduct 117 from 140 and we're left with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 8:
39 can be fit into 230 5 times, resulting in a remainder of 35.
The next digit of our result is 5. 
Result so far: 2333.435
Subtract 195 from 230 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 9:
The number 39 fits into 350 8 times, leaving a remainder of 38.
Record the quotient 8 as the next digit in the result. 
Result so far: 2333.4358
The remainder is 38 after subtracting 312 from 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 10:
The number 39 fits into 380 9 times, leaving a remainder of 29.
Put 9 as the next digit of the answer. 
Result so far: 2333.43589
If we take 351 away from 380, 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.

On to step 11:
If we divide 290 by 39, we get 7 and a remainder of 17.
The number 7 becomes the next digit in our result. 
Result so far: 2333.435897
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.

Step 12:
39 goes into 170 4 times with a remainder of 14.
Record the quotient 4 as the next digit in the result. 
Result so far: 2333.4358974
If we take 156 away from 170, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 13:
If we divide 140 by 39, we get 3 and a remainder of 23.
Write down 3 as next digit of the result. 
Result so far: 2333.43589743
If we subtract 117 from 140, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

The final result is 2333.43589743 with a remainder of 2.3e-08.