We're dividing 369644 by 39 
The aim is to understand the frequency of 39 in 369644.

Advancing to step 1:
3 divided by 39 is 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (6) from the dividend, add it to 3, then carry on: 36 / 39

Going ahead to step 2:
If we divide 36 by 39, we get 0 and a remainder of 36.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 36 after subtracting 0 from 36.
Append the next digit (9) from the dividend to 36 and continue with: 369 / 39

Let's proceed to step 3:
39 goes into 369 9 times with a remainder of 18.
Use 9 as the next digit of our solution. 
Result so far: 9.0
If we subtract 351 from 369, we get 18.
Include the next digit (6) from the dividend after 18, then repeat: 186 / 39

Let's proceed to step 4:
The number 39 fits into 186 4 times, leaving a remainder of 30.
Put 4 as the next digit of the answer. 
Result so far: 94.0
Subtracting 156 from 186 leaves us with 30.
Grab the next digit (4) from the dividend, add it to 30, then carry on: 304 / 39

Advancing to step 5:
39 can be fit into 304 7 times, resulting in a remainder of 31.
The number 7 becomes the next digit in our result. 
Result so far: 947.0
The remainder is 31 after subtracting 273 from 304.
Fetch the next digit (4) from the dividend, attach it to 31 and continue: 314 / 39

Going ahead to step 6:
When dividing 314 by 39, we get 8 with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 9478.0
If we subtract 312 from 314, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 7:
20 divided by 39 is 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 9478.0
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 8:
200 divided by 39 is 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 9478.05
The remainder is 5 after subtracting 195 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 9:
39 goes into 50 1 times with a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 9478.051
If we take 39 away from 50, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 10:
When dividing 110 by 39, we get 2 with a remainder of 32.
The number 2 becomes the next digit in our result. 
Result so far: 9478.0512
Deduct 78 from 110 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 11:
When dividing 320 by 39, we get 8 with a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 9478.05128
The remainder is 8 after subtracting 312 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 12:
When dividing 80 by 39, we get 2 with a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 9478.051282
If we take 78 away from 80, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 13:
39 goes into 20 0 times with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 9478.051282
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 14:
When dividing 200 by 39, we get 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 9478.05128205
The remainder is 5 after subtracting 195 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final outcome is 9478.05128205, with a leftover of 5e-09.