537569 ÷ 39 
The aim is to understand the frequency of 39 in 537569.

Let's proceed to step 1:
5 divided by 39 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Append the next digit (3) from the dividend to 5 and continue with: 53 / 39

Step 2:
39 can be fit into 53 1 times, resulting in a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 39 away from 53, we end up with 14.
Grab the next digit (7) from the dividend, add it to 14, then carry on: 147 / 39

Step 3:
The number 39 fits into 147 3 times, leaving a remainder of 30.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
The remainder is 30 after subtracting 117 from 147.
Take the next digit (5) from the dividend and append it to 30, then repeat: 305 / 39

Step 4:
39 goes into 305 7 times with a remainder of 32.
Put 7 as the next digit of the answer. 
Result so far: 137.0
The remainder is 32 after subtracting 273 from 305.
Grab the next digit (6) from the dividend, add it to 32, then carry on: 326 / 39

Step 5:
326 divided by 39 is 8 with a remainder of 14.
Use 8 as the next digit of our solution. 
Result so far: 1378.0
Deduct 312 from 326 and we're left with 14.
Bring next digit (9) of the dividend behind the 14 and repeat the process: 149 / 39

Going ahead to step 6:
39 can be fit into 149 3 times, resulting in a remainder of 32.
The number 3 becomes the next digit in our result. 
Result so far: 13783.0
The remainder is 32 after subtracting 117 from 149.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 7:
320 divided by 39 is 8 with a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 13783.8
Subtracting 312 from 320 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 8:
When dividing 80 by 39, we get 2 with a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 13783.82
If we subtract 78 from 80, 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.

Going ahead to step 9:
39 goes into 20 0 times with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 13783.82
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.

Let's proceed to step 10:
39 goes into 200 5 times with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 13783.8205
If we take 195 away from 200, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 11:
39 can be fit into 50 1 times, resulting in a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 13783.82051
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.

Going ahead to step 12:
The number 39 fits into 110 2 times, leaving a remainder of 32.
The number 2 becomes the next digit in our result. 
Result so far: 13783.820512
The remainder is 32 after subtracting 78 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 13:
39 goes into 320 8 times with a remainder of 8.
Put 8 as the next digit of the answer. 
Result so far: 13783.8205128
Subtracting 312 from 320 leaves us with 8.
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 14:
If we divide 80 by 39, we get 2 and a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 13783.82051282
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.

The final outcome is 13783.82051282, with a leftover of 2e-09.