We look at the division of 434690 by 39 
The aim is to understand the frequency of 39 in 434690.

Step 1:
The number 39 fits into 4 0 times, leaving a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Include the next digit (3) from the dividend after 4, then repeat: 43 / 39

Going ahead to step 2:
When dividing 43 by 39, we get 1 with a remainder of 4.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 39 from 43 and we're left with 4.
Append the next digit (4) from the dividend to 4 and continue with: 44 / 39

Let's proceed to step 3:
39 goes into 44 1 times with a remainder of 5.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Subtract 39 from 44 to get 5.
Include the next digit (6) from the dividend after 5, then repeat: 56 / 39

Advancing to step 4:
When dividing 56 by 39, we get 1 with a remainder of 17.
Use 1 as the next digit of our solution. 
Result so far: 111.0
If we take 39 away from 56, we end up with 17.
Append the next digit (9) from the dividend to 17 and continue with: 179 / 39

Moving on to step 5:
179 divided by 39 is 4 with a remainder of 23.
The next digit of our result is 4. 
Result so far: 1114.0
If we subtract 156 from 179, we get 23.
Append the next digit (0) from the dividend to 23 and continue with: 230 / 39

Step 6:
39 can be fit into 230 5 times, resulting in a remainder of 35.
The number 5 becomes the next digit in our result. 
Result so far: 11145.0
If we subtract 195 from 230, we 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.

On to step 7:
39 goes into 350 8 times with a remainder of 38.
Record the quotient 8 as the next digit in the result. 
Result so far: 11145.8
The remainder is 38 after subtracting 312 from 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 8:
380 divided by 39 is 9 with a remainder of 29.
Put 9 as the next digit of the answer. 
Result so far: 11145.89
Deduct 351 from 380 and we're left with 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 9:
If we divide 290 by 39, we get 7 and a remainder of 17.
The number 7 becomes the next digit in our result. 
Result so far: 11145.897
The remainder is 17 after subtracting 273 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 10:
If we divide 170 by 39, we get 4 and a remainder of 14.
Record the quotient 4 as the next digit in the result. 
Result so far: 11145.8974
Deduct 156 from 170 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 11:
140 divided by 39 is 3 with a remainder of 23.
The number 3 becomes the next digit in our result. 
Result so far: 11145.89743
Subtract 117 from 140 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Moving on to step 12:
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: 11145.897435
If we subtract 195 from 230, we 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.

Moving on to step 13:
When dividing 350 by 39, we get 8 with a remainder of 38.
The number 8 becomes the next digit in our result. 
Result so far: 11145.8974358
Subtract 312 from 350 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 14:
The number 39 fits into 380 9 times, leaving a remainder of 29.
Write down 9 as next digit of the result. 
Result so far: 11145.89743589
If we subtract 351 from 380, we 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.

The final result is 11145.89743589 with a remainder of 2.9e-08.