915409 divided by 39 
The aim is to understand the frequency of 39 in 915409.

Going ahead to step 1:
When dividing 9 by 39, we get 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 39

Advancing to step 2:
91 divided by 39 is 2 with a remainder of 13.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 78 from 91, we get 13.
Bring next digit (5) of the dividend behind the 13 and repeat the process: 135 / 39

Going ahead to step 3:
39 goes into 135 3 times with a remainder of 18.
Put 3 as the next digit of the answer. 
Result so far: 23.0
Deduct 117 from 135 and we're left with 18.
Bring next digit (4) of the dividend behind the 18 and repeat the process: 184 / 39

Going ahead to step 4:
184 divided by 39 is 4 with a remainder of 28.
The number 4 becomes the next digit in our result. 
Result so far: 234.0
Subtracting 156 from 184 leaves us with 28.
Bring next digit (0) of the dividend behind the 28 and repeat the process: 280 / 39

Step 5:
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: 2347.0
The remainder is 7 after subtracting 273 from 280.
Bring next digit (9) of the dividend behind the 7 and repeat the process: 79 / 39

Advancing to step 6:
79 divided by 39 is 2 with a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 23472.0
Subtract 78 from 79 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.

Advancing to step 7:
When dividing 10 by 39, we get 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 23472.0
Deduct 0 from 10 and we're left with 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 8:
39 can be fit into 100 2 times, resulting in a remainder of 22.
Put 2 as the next digit of the answer. 
Result so far: 23472.02
Deduct 78 from 100 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 9:
220 divided by 39 is 5 with a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 23472.025
If we take 195 away from 220, we end up 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.

Step 10:
The number 39 fits into 250 6 times, leaving a remainder of 16.
Put 6 as the next digit of the answer. 
Result so far: 23472.0256
Subtracting 234 from 250 leaves us 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.

Let's proceed to step 11:
160 divided by 39 is 4 with a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 23472.02564
Deduct 156 from 160 and we're left with 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 12:
The number 39 fits into 40 1 times, leaving a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 23472.025641
Deduct 39 from 40 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 13:
When dividing 10 by 39, we get 0 with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 23472.025641
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 14:
100 divided by 39 is 2 with a remainder of 22.
The number 2 becomes the next digit in our result. 
Result so far: 23472.02564102
If we take 78 away from 100, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

In conclusion, the division gives 23472.02564102 with a balance of 2.2e-08.