187691 divided by 39 
The aim is to understand the frequency of 39 in 187691.

Advancing to step 1:
When dividing 1 by 39, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 39

On to step 2:
The number 39 fits into 18 0 times, leaving a remainder of 18.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 18, we get 18.
Grab the next digit (7) from the dividend, add it to 18, then carry on: 187 / 39

On to step 3:
The number 39 fits into 187 4 times, leaving a remainder of 31.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 156 from 187 and we're left with 31.
Grab the next digit (6) from the dividend, add it to 31, then carry on: 316 / 39

Step 4:
When dividing 316 by 39, we get 8 with a remainder of 4.
The next digit of our result is 8. 
Result so far: 48.0
If we take 312 away from 316, we end up with 4.
Include the next digit (9) from the dividend after 4, then repeat: 49 / 39

On to step 5:
39 goes into 49 1 times with a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 481.0
Subtracting 39 from 49 leaves us with 10.
Grab the next digit (1) from the dividend, add it to 10, then carry on: 101 / 39

Going ahead to step 6:
If we divide 101 by 39, we get 2 and a remainder of 23.
Put 2 as the next digit of the answer. 
Result so far: 4812.0
If we take 78 away from 101, we end up 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.

Going ahead to step 7:
The number 39 fits into 230 5 times, leaving a remainder of 35.
Use 5 as the next digit of our solution. 
Result so far: 4812.5
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 8:
39 can be fit into 350 8 times, resulting in a remainder of 38.
Use 8 as the next digit of our solution. 
Result so far: 4812.58
Deduct 312 from 350 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 9:
380 divided by 39 is 9 with a remainder of 29.
Put 9 as the next digit of the answer. 
Result so far: 4812.589
Subtract 351 from 380 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Let's proceed to step 10:
If we divide 290 by 39, we get 7 and a remainder of 17.
Write down 7 as next digit of the result. 
Result so far: 4812.5897
Subtract 273 from 290 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 11:
When dividing 170 by 39, we get 4 with a remainder of 14.
Write down 4 as next digit of the result. 
Result so far: 4812.58974
Subtract 156 from 170 to get 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 12:
If we divide 140 by 39, we get 3 and a remainder of 23.
The next digit of our result is 3. 
Result so far: 4812.589743
Subtracting 117 from 140 leaves us 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.

On to step 13:
When dividing 230 by 39, we get 5 with a remainder of 35.
Write down 5 as next digit of the result. 
Result so far: 4812.5897435
Subtracting 195 from 230 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 14:
39 can be fit into 350 8 times, resulting in a remainder of 38.
The next digit of our result is 8. 
Result so far: 4812.58974358
Deduct 312 from 350 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

The quotient of the division is 4812.58974358, and the remainder is 3.8e-08.