42852 ÷ 51 
The aim is to understand the frequency of 51 in 42852.

Going ahead to step 1:
If we divide 4 by 51, we get 0 and a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 51

Step 2:
51 goes into 42 0 times with a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 42 to get 42.
Take the next digit (8) from the dividend and append it to 42, then repeat: 428 / 51

Step 3:
The number 51 fits into 428 8 times, leaving a remainder of 20.
Use 8 as the next digit of our solution. 
Result so far: 8.0
The remainder is 20 after subtracting 408 from 428.
Fetch the next digit (5) from the dividend, attach it to 20 and continue: 205 / 51

On to step 4:
51 goes into 205 4 times with a remainder of 1.
Use 4 as the next digit of our solution. 
Result so far: 84.0
If we subtract 204 from 205, we get 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 51

Let's proceed to step 5:
The number 51 fits into 12 0 times, leaving a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 840.0
Deduct 0 from 12 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 6:
51 goes into 120 2 times with a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 840.2
Deduct 102 from 120 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 7:
180 divided by 51 is 3 with a remainder of 27.
The next digit of our result is 3. 
Result so far: 840.23
Deduct 153 from 180 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

On to step 8:
The number 51 fits into 270 5 times, leaving a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 840.235
Deduct 255 from 270 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 9:
51 can be fit into 150 2 times, resulting in a remainder of 48.
The number 2 becomes the next digit in our result. 
Result so far: 840.2352
If we subtract 102 from 150, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 10:
51 goes into 480 9 times with a remainder of 21.
Write down 9 as next digit of the result. 
Result so far: 840.23529
Deduct 459 from 480 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 11:
51 can be fit into 210 4 times, resulting in a remainder of 6.
The next digit of our result is 4. 
Result so far: 840.235294
The remainder is 6 after subtracting 204 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 12:
51 goes into 60 1 times with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 840.2352941
Deduct 51 from 60 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 13:
51 can be fit into 90 1 times, resulting in a remainder of 39.
The next digit of our result is 1. 
Result so far: 840.23529411
If we subtract 51 from 90, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

The final result is 840.23529411 with a remainder of 3.9e-08.