We look at the division of 51241552 by 404 
The aim is to understand the frequency of 404 in 51241552.

On to step 1:
5 divided by 404 is 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 404

On to step 2:
The number 404 fits into 51 0 times, leaving a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Grab the next digit (2) from the dividend, add it to 51, then carry on: 512 / 404

Moving on to step 3:
The number 404 fits into 512 1 times, leaving a remainder of 108.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 404 from 512 leaves us with 108.
Bring next digit (4) of the dividend behind the 108 and repeat the process: 1084 / 404

Moving on to step 4:
404 goes into 1084 2 times with a remainder of 276.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Subtracting 808 from 1084 leaves us with 276.
Take the next digit (1) from the dividend and append it to 276, then repeat: 2761 / 404

Moving on to step 5:
404 goes into 2761 6 times with a remainder of 337.
Record the quotient 6 as the next digit in the result. 
Result so far: 126.0
Subtracting 2424 from 2761 leaves us with 337.
Bring next digit (5) of the dividend behind the 337 and repeat the process: 3375 / 404

Advancing to step 6:
3375 divided by 404 is 8 with a remainder of 143.
Write down 8 as next digit of the result. 
Result so far: 1268.0
If we take 3232 away from 3375, we end up with 143.
Grab the next digit (5) from the dividend, add it to 143, then carry on: 1435 / 404

Let's proceed to step 7:
The number 404 fits into 1435 3 times, leaving a remainder of 223.
Write down 3 as next digit of the result. 
Result so far: 12683.0
Subtracting 1212 from 1435 leaves us with 223.
Fetch the next digit (2) from the dividend, attach it to 223 and continue: 2232 / 404

Let's proceed to step 8:
When dividing 2232 by 404, we get 5 with a remainder of 212.
Write down 5 as next digit of the result. 
Result so far: 126835.0
Subtracting 2020 from 2232 leaves us with 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Advancing to step 9:
2120 divided by 404 is 5 with a remainder of 100.
The number 5 becomes the next digit in our result. 
Result so far: 126835.5
The remainder is 100 after subtracting 2020 from 2120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Step 10:
404 goes into 1000 2 times with a remainder of 192.
Record the quotient 2 as the next digit in the result. 
Result so far: 126835.52
The remainder is 192 after subtracting 808 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

On to step 11:
404 can be fit into 1920 4 times, resulting in a remainder of 304.
The next digit of our result is 4. 
Result so far: 126835.524
Subtracting 1616 from 1920 leaves us with 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Let's proceed to step 12:
If we divide 3040 by 404, we get 7 and a remainder of 212.
Write down 7 as next digit of the result. 
Result so far: 126835.5247
The remainder is 212 after subtracting 2828 from 3040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Step 13:
The number 404 fits into 2120 5 times, leaving a remainder of 100.
Record the quotient 5 as the next digit in the result. 
Result so far: 126835.52475
The remainder is 100 after subtracting 2020 from 2120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Advancing to step 14:
1000 divided by 404 is 2 with a remainder of 192.
Write down 2 as next digit of the result. 
Result so far: 126835.524752
If we subtract 808 from 1000, we get 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Going ahead to step 15:
1920 divided by 404 is 4 with a remainder of 304.
Record the quotient 4 as the next digit in the result. 
Result so far: 126835.5247524
If we take 1616 away from 1920, we end up with 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Moving on to step 16:
3040 divided by 404 is 7 with a remainder of 212.
Record the quotient 7 as the next digit in the result. 
Result so far: 126835.52475247
If we subtract 2828 from 3040, we get 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Our division results in 126835.52475247 with a remaining 2.12e-07.