347871 ÷ 51 
The aim is to understand the frequency of 51 in 347871.

Step 1:
3 divided by 51 is 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (4) of the dividend behind the 3 and repeat the process: 34 / 51

Going ahead to step 2:
51 goes into 34 0 times with a remainder of 34.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 34 leaves us with 34.
Grab the next digit (7) from the dividend, add it to 34, then carry on: 347 / 51

Let's proceed to step 3:
If we divide 347 by 51, we get 6 and a remainder of 41.
Write down 6 as next digit of the result. 
Result so far: 6.0
Deduct 306 from 347 and we're left with 41.
Append the next digit (8) from the dividend to 41 and continue with: 418 / 51

Going ahead to step 4:
51 goes into 418 8 times with a remainder of 10.
The next digit of our result is 8. 
Result so far: 68.0
Subtract 408 from 418 to get 10.
Include the next digit (7) from the dividend after 10, then repeat: 107 / 51

On to step 5:
When dividing 107 by 51, we get 2 with a remainder of 5.
The next digit of our result is 2. 
Result so far: 682.0
Subtracting 102 from 107 leaves us with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 51

On to step 6:
51 can be fit into 51 1 times, resulting in a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 6821.0
Subtract 51 from 51 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 7:
51 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 6821.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
0 divided by 51 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 6821.0
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 6821.0 and a remainder of 0.0.