356509 ÷ 39 
The aim is to understand the frequency of 39 in 356509.

Going ahead to step 1:
The number 39 fits into 3 0 times, leaving a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 39

Moving on to step 2:
When dividing 35 by 39, we get 0 with a remainder of 35.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 35 and we're left with 35.
Fetch the next digit (6) from the dividend, attach it to 35 and continue: 356 / 39

On to step 3:
The number 39 fits into 356 9 times, leaving a remainder of 5.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
If we subtract 351 from 356, we get 5.
Take the next digit (5) from the dividend and append it to 5, then repeat: 55 / 39

Moving on to step 4:
55 divided by 39 is 1 with a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 91.0
Subtract 39 from 55 to get 16.
Fetch the next digit (0) from the dividend, attach it to 16 and continue: 160 / 39

Advancing to step 5:
The number 39 fits into 160 4 times, leaving a remainder of 4.
Record the quotient 4 as the next digit in the result. 
Result so far: 914.0
Subtract 156 from 160 to get 4.
Bring next digit (9) of the dividend behind the 4 and repeat the process: 49 / 39

Step 6:
39 can be fit into 49 1 times, resulting in a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 9141.0
Subtract 39 from 49 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 7:
39 can be fit into 100 2 times, resulting in a remainder of 22.
Use 2 as the next digit of our solution. 
Result so far: 9141.2
Subtract 78 from 100 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 8:
When dividing 220 by 39, we get 5 with a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 9141.25
Subtract 195 from 220 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 9:
When dividing 250 by 39, we get 6 with a remainder of 16.
The number 6 becomes the next digit in our result. 
Result so far: 9141.256
Deduct 234 from 250 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 10:
If we divide 160 by 39, we get 4 and a remainder of 4.
Write down 4 as next digit of the result. 
Result so far: 9141.2564
If we subtract 156 from 160, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 11:
39 goes into 40 1 times with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 9141.25641
Subtract 39 from 40 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 12:
39 can be fit into 10 0 times, resulting in a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 9141.25641
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 13:
The number 39 fits into 100 2 times, leaving a remainder of 22.
Write down 2 as next digit of the result. 
Result so far: 9141.2564102
If we subtract 78 from 100, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 14:
39 can be fit into 220 5 times, resulting in a remainder of 25.
The next digit of our result is 5. 
Result so far: 9141.25641025
Subtracting 195 from 220 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

The quotient of the division is 9141.25641025, and the remainder is 2.5e-08.