We look at the division of 429109 by 39 
The aim is to understand the frequency of 39 in 429109.

On to step 1:
4 divided by 39 is 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 39

Let's proceed to step 2:
42 divided by 39 is 1 with a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 39 away from 42, we end up with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 39

Moving on to step 3:
39 goes into 39 1 times with a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we subtract 39 from 39, we get 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 39

On to step 4:
When dividing 1 by 39, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 110.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 39

Step 5:
10 divided by 39 is 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 1100.0
If we take 0 away from 10, we end up with 10.
Include the next digit (9) from the dividend after 10, then repeat: 109 / 39

Going ahead to step 6:
When dividing 109 by 39, we get 2 with a remainder of 31.
Record the quotient 2 as the next digit in the result. 
Result so far: 11002.0
The remainder is 31 after subtracting 78 from 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Step 7:
310 divided by 39 is 7 with a remainder of 37.
Write down 7 as next digit of the result. 
Result so far: 11002.7
Subtract 273 from 310 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 8:
When dividing 370 by 39, we get 9 with a remainder of 19.
Record the quotient 9 as the next digit in the result. 
Result so far: 11002.79
If we take 351 away from 370, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 9:
If we divide 190 by 39, we get 4 and a remainder of 34.
Put 4 as the next digit of the answer. 
Result so far: 11002.794
If we subtract 156 from 190, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 10:
If we divide 340 by 39, we get 8 and a remainder of 28.
The next digit of our result is 8. 
Result so far: 11002.7948
Subtract 312 from 340 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 11:
39 can be fit into 280 7 times, resulting in a remainder of 7.
Put 7 as the next digit of the answer. 
Result so far: 11002.79487
Subtract 273 from 280 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 12:
When dividing 70 by 39, we get 1 with a remainder of 31.
Write down 1 as next digit of the result. 
Result so far: 11002.794871
If we take 39 away from 70, we end up with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 13:
The number 39 fits into 310 7 times, leaving a remainder of 37.
Write down 7 as next digit of the result. 
Result so far: 11002.7948717
Subtracting 273 from 310 leaves us with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Moving on to step 14:
39 can be fit into 370 9 times, resulting in a remainder of 19.
Record the quotient 9 as the next digit in the result. 
Result so far: 11002.79487179
Deduct 351 from 370 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

In conclusion, the division gives 11002.79487179 with a balance of 1.9e-08.