We're dividing 52911129 by 408 
The aim is to understand the frequency of 408 in 52911129.

Advancing to step 1:
The number 408 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Fetch the next digit (2) from the dividend, attach it to 5 and continue: 52 / 408

On to step 2:
52 divided by 408 is 0 with a remainder of 52.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 52 leaves us with 52.
Include the next digit (9) from the dividend after 52, then repeat: 529 / 408

Going ahead to step 3:
408 goes into 529 1 times with a remainder of 121.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 408 from 529 leaves us with 121.
Include the next digit (1) from the dividend after 121, then repeat: 1211 / 408

Let's proceed to step 4:
1211 divided by 408 is 2 with a remainder of 395.
Use 2 as the next digit of our solution. 
Result so far: 12.0
If we take 816 away from 1211, we end up with 395.
Take the next digit (1) from the dividend and append it to 395, then repeat: 3951 / 408

Moving on to step 5:
3951 divided by 408 is 9 with a remainder of 279.
Put 9 as the next digit of the answer. 
Result so far: 129.0
If we subtract 3672 from 3951, we get 279.
Fetch the next digit (1) from the dividend, attach it to 279 and continue: 2791 / 408

Advancing to step 6:
2791 divided by 408 is 6 with a remainder of 343.
Write down 6 as next digit of the result. 
Result so far: 1296.0
Subtract 2448 from 2791 to get 343.
Bring next digit (2) of the dividend behind the 343 and repeat the process: 3432 / 408

Moving on to step 7:
408 goes into 3432 8 times with a remainder of 168.
Use 8 as the next digit of our solution. 
Result so far: 12968.0
Deduct 3264 from 3432 and we're left with 168.
Bring next digit (9) of the dividend behind the 168 and repeat the process: 1689 / 408

Let's proceed to step 8:
408 can be fit into 1689 4 times, resulting in a remainder of 57.
Use 4 as the next digit of our solution. 
Result so far: 129684.0
The remainder is 57 after subtracting 1632 from 1689.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Going ahead to step 9:
408 goes into 570 1 times with a remainder of 162.
Use 1 as the next digit of our solution. 
Result so far: 129684.1
The remainder is 162 after subtracting 408 from 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

On to step 10:
The number 408 fits into 1620 3 times, leaving a remainder of 396.
Write down 3 as next digit of the result. 
Result so far: 129684.13
Subtract 1224 from 1620 to get 396.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3960, and continue the process.

Going ahead to step 11:
3960 divided by 408 is 9 with a remainder of 288.
Record the quotient 9 as the next digit in the result. 
Result so far: 129684.139
If we take 3672 away from 3960, we end up with 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

On to step 12:
2880 divided by 408 is 7 with a remainder of 24.
Write down 7 as next digit of the result. 
Result so far: 129684.1397
If we subtract 2856 from 2880, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 13:
If we divide 240 by 408, we get 0 and a remainder of 240.
The number 0 becomes the next digit in our result. 
Result so far: 129684.1397
If we take 0 away from 240, we end up with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Moving on to step 14:
The number 408 fits into 2400 5 times, leaving a remainder of 360.
The next digit of our result is 5. 
Result so far: 129684.139705
Deduct 2040 from 2400 and we're left with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Moving on to step 15:
408 can be fit into 3600 8 times, resulting in a remainder of 336.
Write down 8 as next digit of the result. 
Result so far: 129684.1397058
Deduct 3264 from 3600 and we're left with 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

Moving on to step 16:
If we divide 3360 by 408, we get 8 and a remainder of 96.
Put 8 as the next digit of the answer. 
Result so far: 129684.13970588
Subtracting 3264 from 3360 leaves us with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

In conclusion, the division gives 129684.13970588 with a balance of 9.6e-08.