We look at the division of 307081 by 51 
The aim is to understand the frequency of 51 in 307081.

Step 1:
If we divide 3 by 51, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 51

Moving on to step 2:
30 divided by 51 is 0 with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 30 leaves us with 30.
Fetch the next digit (7) from the dividend, attach it to 30 and continue: 307 / 51

Step 3:
51 can be fit into 307 6 times, resulting in a remainder of 1.
The next digit of our result is 6. 
Result so far: 6.0
If we subtract 306 from 307, we get 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 51

Going ahead to step 4:
10 divided by 51 is 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 60.0
Subtract 0 from 10 to get 10.
Take the next digit (8) from the dividend and append it to 10, then repeat: 108 / 51

Step 5:
When dividing 108 by 51, we get 2 with a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 602.0
Deduct 102 from 108 and we're left with 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 51

Advancing to step 6:
51 goes into 61 1 times with a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 6021.0
Deduct 51 from 61 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.

Let's proceed to step 7:
The number 51 fits into 100 1 times, leaving a remainder of 49.
The next digit of our result is 1. 
Result so far: 6021.1
The remainder is 49 after subtracting 51 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Advancing to step 8:
51 can be fit into 490 9 times, resulting in a remainder of 31.
Put 9 as the next digit of the answer. 
Result so far: 6021.19
Subtracting 459 from 490 leaves us 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.

Going ahead to step 9:
51 can be fit into 310 6 times, resulting in a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 6021.196
Deduct 306 from 310 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.

Advancing to step 10:
51 goes into 40 0 times with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 6021.196
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 11:
51 goes into 400 7 times with a remainder of 43.
The number 7 becomes the next digit in our result. 
Result so far: 6021.19607
Deduct 357 from 400 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 12:
430 divided by 51 is 8 with a remainder of 22.
Use 8 as the next digit of our solution. 
Result so far: 6021.196078
If we subtract 408 from 430, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 13:
51 can be fit into 220 4 times, resulting in a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 6021.1960784
The remainder is 16 after subtracting 204 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 14:
If we divide 160 by 51, we get 3 and a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 6021.19607843
Deduct 153 from 160 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Our division results in 6021.19607843 with a remaining 7e-09.