We look at the division of 39915420 by 307 
The aim is to understand the frequency of 307 in 39915420.

Let's proceed to step 1:
307 goes into 3 0 times with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 307

Advancing to step 2:
39 divided by 307 is 0 with a remainder of 39.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Append the next digit (9) from the dividend to 39 and continue with: 399 / 307

Step 3:
307 goes into 399 1 times with a remainder of 92.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 307 from 399 to get 92.
Fetch the next digit (1) from the dividend, attach it to 92 and continue: 921 / 307

On to step 4:
The number 307 fits into 921 3 times, leaving a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
If we take 921 away from 921, we end up with 0.
Bring next digit (5) of the dividend behind the 0 and repeat the process: 5 / 307

Going ahead to step 5:
307 goes into 5 0 times with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 130.0
The remainder is 5 after subtracting 0 from 5.
Append the next digit (4) from the dividend to 5 and continue with: 54 / 307

Moving on to step 6:
If we divide 54 by 307, we get 0 and a remainder of 54.
Use 0 as the next digit of our solution. 
Result so far: 1300.0
Subtracting 0 from 54 leaves us with 54.
Bring next digit (2) of the dividend behind the 54 and repeat the process: 542 / 307

Moving on to step 7:
If we divide 542 by 307, we get 1 and a remainder of 235.
Write down 1 as next digit of the result. 
Result so far: 13001.0
If we take 307 away from 542, we end up with 235.
Append the next digit (0) from the dividend to 235 and continue with: 2350 / 307

Advancing to step 8:
2350 divided by 307 is 7 with a remainder of 201.
The next digit of our result is 7. 
Result so far: 130017.0
Subtracting 2149 from 2350 leaves us with 201.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2010, and continue the process.

Advancing to step 9:
307 can be fit into 2010 6 times, resulting in a remainder of 168.
Write down 6 as next digit of the result. 
Result so far: 130017.6
Subtract 1842 from 2010 to get 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Moving on to step 10:
The number 307 fits into 1680 5 times, leaving a remainder of 145.
Put 5 as the next digit of the answer. 
Result so far: 130017.65
If we subtract 1535 from 1680, we get 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Advancing to step 11:
When dividing 1450 by 307, we get 4 with a remainder of 222.
Record the quotient 4 as the next digit in the result. 
Result so far: 130017.654
If we subtract 1228 from 1450, we get 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

Let's proceed to step 12:
When dividing 2220 by 307, we get 7 with a remainder of 71.
Use 7 as the next digit of our solution. 
Result so far: 130017.6547
Deduct 2149 from 2220 and we're left with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

On to step 13:
If we divide 710 by 307, we get 2 and a remainder of 96.
The next digit of our result is 2. 
Result so far: 130017.65472
Deduct 614 from 710 and we're left with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Moving on to step 14:
307 can be fit into 960 3 times, resulting in a remainder of 39.
Use 3 as the next digit of our solution. 
Result so far: 130017.654723
The remainder is 39 after subtracting 921 from 960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

On to step 15:
307 can be fit into 390 1 times, resulting in a remainder of 83.
Use 1 as the next digit of our solution. 
Result so far: 130017.6547231
Subtract 307 from 390 to get 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Let's proceed to step 16:
The number 307 fits into 830 2 times, leaving a remainder of 216.
Write down 2 as next digit of the result. 
Result so far: 130017.65472312
Deduct 614 from 830 and we're left with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

In conclusion, the division gives 130017.65472312 with a balance of 2.16e-07.