Let's divide 51215371 by 412
The aim is to understand the frequency of 412 in 51215371.

On to step 1:
412 goes into 5 0 times with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 412

Step 2:
412 goes into 51 0 times with a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Bring next digit (2) of the dividend behind the 51 and repeat the process: 512 / 412

Moving on to step 3:
If we divide 512 by 412, we get 1 and a remainder of 100.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 412 from 512 leaves us with 100.
Bring next digit (1) of the dividend behind the 100 and repeat the process: 1001 / 412

Going ahead to step 4:
If we divide 1001 by 412, we get 2 and a remainder of 177.
The next digit of our result is 2. 
Result so far: 12.0
The remainder is 177 after subtracting 824 from 1001.
Bring next digit (5) of the dividend behind the 177 and repeat the process: 1775 / 412

Step 5:
412 goes into 1775 4 times with a remainder of 127.
Use 4 as the next digit of our solution. 
Result so far: 124.0
Deduct 1648 from 1775 and we're left with 127.
Take the next digit (3) from the dividend and append it to 127, then repeat: 1273 / 412

Step 6:
412 can be fit into 1273 3 times, resulting in a remainder of 37.
The next digit of our result is 3. 
Result so far: 1243.0
Deduct 1236 from 1273 and we're left with 37.
Bring next digit (7) of the dividend behind the 37 and repeat the process: 377 / 412

Step 7:
When dividing 377 by 412, we get 0 with a remainder of 377.
Record the quotient 0 as the next digit in the result. 
Result so far: 12430.0
Subtract 0 from 377 to get 377.
Grab the next digit (1) from the dividend, add it to 377, then carry on: 3771 / 412

Moving on to step 8:
412 can be fit into 3771 9 times, resulting in a remainder of 63.
Write down 9 as next digit of the result. 
Result so far: 124309.0
Deduct 3708 from 3771 and we're left with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Advancing to step 9:
When dividing 630 by 412, we get 1 with a remainder of 218.
Use 1 as the next digit of our solution. 
Result so far: 124309.1
The remainder is 218 after subtracting 412 from 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

Let's proceed to step 10:
2180 divided by 412 is 5 with a remainder of 120.
The next digit of our result is 5. 
Result so far: 124309.15
Subtract 2060 from 2180 to get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Advancing to step 11:
If we divide 1200 by 412, we get 2 and a remainder of 376.
The next digit of our result is 2. 
Result so far: 124309.152
The remainder is 376 after subtracting 824 from 1200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

Going ahead to step 12:
When dividing 3760 by 412, we get 9 with a remainder of 52.
The next digit of our result is 9. 
Result so far: 124309.1529
If we take 3708 away from 3760, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 13:
412 goes into 520 1 times with a remainder of 108.
Write down 1 as next digit of the result. 
Result so far: 124309.15291
The remainder is 108 after subtracting 412 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Moving on to step 14:
The number 412 fits into 1080 2 times, leaving a remainder of 256.
Write down 2 as next digit of the result. 
Result so far: 124309.152912
Subtracting 824 from 1080 leaves us with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Step 15:
If we divide 2560 by 412, we get 6 and a remainder of 88.
Write down 6 as next digit of the result. 
Result so far: 124309.1529126
The remainder is 88 after subtracting 2472 from 2560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Going ahead to step 16:
412 can be fit into 880 2 times, resulting in a remainder of 56.
Use 2 as the next digit of our solution. 
Result so far: 124309.15291262
The remainder is 56 after subtracting 824 from 880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

The final result is 124309.15291262 with a remainder of 5.6e-08.