We're dividing 12371019 by 307 
The aim is to understand the frequency of 307 in 12371019.

Step 1:
The number 307 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 307

Step 2:
307 can be fit into 12 0 times, resulting in a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Include the next digit (3) from the dividend after 12, then repeat: 123 / 307

Advancing to step 3:
307 goes into 123 0 times with a remainder of 123.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 123, we end up with 123.
Append the next digit (7) from the dividend to 123 and continue with: 1237 / 307

Let's proceed to step 4:
The number 307 fits into 1237 4 times, leaving a remainder of 9.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 1228 from 1237 and we're left with 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 307

Step 5:
The number 307 fits into 91 0 times, leaving a remainder of 91.
Record the quotient 0 as the next digit in the result. 
Result so far: 40.0
If we subtract 0 from 91, we get 91.
Take the next digit (0) from the dividend and append it to 91, then repeat: 910 / 307

Advancing to step 6:
The number 307 fits into 910 2 times, leaving a remainder of 296.
Write down 2 as next digit of the result. 
Result so far: 402.0
Subtract 614 from 910 to get 296.
Take the next digit (1) from the dividend and append it to 296, then repeat: 2961 / 307

Moving on to step 7:
307 goes into 2961 9 times with a remainder of 198.
Write down 9 as next digit of the result. 
Result so far: 4029.0
If we subtract 2763 from 2961, we get 198.
Append the next digit (9) from the dividend to 198 and continue with: 1989 / 307

Advancing to step 8:
307 can be fit into 1989 6 times, resulting in a remainder of 147.
Put 6 as the next digit of the answer. 
Result so far: 40296.0
The remainder is 147 after subtracting 1842 from 1989.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1470, and continue the process.

Let's proceed to step 9:
307 goes into 1470 4 times with a remainder of 242.
Record the quotient 4 as the next digit in the result. 
Result so far: 40296.4
Subtract 1228 from 1470 to get 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

Going ahead to step 10:
2420 divided by 307 is 7 with a remainder of 271.
Record the quotient 7 as the next digit in the result. 
Result so far: 40296.47
Deduct 2149 from 2420 and we're left with 271.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

Let's proceed to step 11:
307 goes into 2710 8 times with a remainder of 254.
Put 8 as the next digit of the answer. 
Result so far: 40296.478
If we subtract 2456 from 2710, we get 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

Step 12:
When dividing 2540 by 307, we get 8 with a remainder of 84.
Write down 8 as next digit of the result. 
Result so far: 40296.4788
Subtracting 2456 from 2540 leaves us with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Our division results in 40296.4788 with a remaining 0.00084.