We're dividing 15985 by 51 
The aim is to understand the frequency of 51 in 15985.

Going ahead to step 1:
51 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 51

Let's proceed to step 2:
The number 51 fits into 15 0 times, leaving a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Bring next digit (9) of the dividend behind the 15 and repeat the process: 159 / 51

Let's proceed to step 3:
51 goes into 159 3 times with a remainder of 6.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we take 153 away from 159, we end up with 6.
Append the next digit (8) from the dividend to 6 and continue with: 68 / 51

On to step 4:
If we divide 68 by 51, we get 1 and a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 31.0
Subtracting 51 from 68 leaves us with 17.
Bring next digit (5) of the dividend behind the 17 and repeat the process: 175 / 51

Moving on to step 5:
51 goes into 175 3 times with a remainder of 22.
Record the quotient 3 as the next digit in the result. 
Result so far: 313.0
If we subtract 153 from 175, 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.

Let's proceed to step 6:
220 divided by 51 is 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 313.4
If we take 204 away from 220, we end up 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.

Advancing to step 7:
If we divide 160 by 51, we get 3 and a remainder of 7.
The next digit of our result is 3. 
Result so far: 313.43
Subtracting 153 from 160 leaves us 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.

Step 8:
If we divide 70 by 51, we get 1 and a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 313.431
Deduct 51 from 70 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 9:
51 goes into 190 3 times with a remainder of 37.
Write down 3 as next digit of the result. 
Result so far: 313.4313
The remainder is 37 after subtracting 153 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Moving on to step 10:
When dividing 370 by 51, we get 7 with a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 313.43137
Deduct 357 from 370 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 11:
When dividing 130 by 51, we get 2 with a remainder of 28.
The next digit of our result is 2. 
Result so far: 313.431372
If we subtract 102 from 130, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 12:
280 divided by 51 is 5 with a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 313.4313725
Deduct 255 from 280 and we're left 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.

Moving on to step 13:
If we divide 250 by 51, we get 4 and a remainder of 46.
The next digit of our result is 4. 
Result so far: 313.43137254
If we subtract 204 from 250, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

After the division, we end up with 313.43137254 and a remainder of 4.6e-08.