Let's divide 51134469 by 408
The aim is to understand the frequency of 408 in 51134469.

On to step 1:
If we divide 5 by 408, we get 0 and a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 408

Step 2:
408 can be fit into 51 0 times, resulting in a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Append the next digit (1) from the dividend to 51 and continue with: 511 / 408

Moving on to step 3:
The number 408 fits into 511 1 times, leaving a remainder of 103.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 408 from 511 to get 103.
Grab the next digit (3) from the dividend, add it to 103, then carry on: 1033 / 408

Advancing to step 4:
408 can be fit into 1033 2 times, resulting in a remainder of 217.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
Subtract 816 from 1033 to get 217.
Append the next digit (4) from the dividend to 217 and continue with: 2174 / 408

Advancing to step 5:
2174 divided by 408 is 5 with a remainder of 134.
Record the quotient 5 as the next digit in the result. 
Result so far: 125.0
The remainder is 134 after subtracting 2040 from 2174.
Take the next digit (4) from the dividend and append it to 134, then repeat: 1344 / 408

Let's proceed to step 6:
408 goes into 1344 3 times with a remainder of 120.
Use 3 as the next digit of our solution. 
Result so far: 1253.0
Subtract 1224 from 1344 to get 120.
Append the next digit (6) from the dividend to 120 and continue with: 1206 / 408

Moving on to step 7:
408 goes into 1206 2 times with a remainder of 390.
Write down 2 as next digit of the result. 
Result so far: 12532.0
Subtract 816 from 1206 to get 390.
Append the next digit (9) from the dividend to 390 and continue with: 3909 / 408

Going ahead to step 8:
3909 divided by 408 is 9 with a remainder of 237.
Write down 9 as next digit of the result. 
Result so far: 125329.0
The remainder is 237 after subtracting 3672 from 3909.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2370, and continue the process.

Going ahead to step 9:
408 can be fit into 2370 5 times, resulting in a remainder of 330.
Write down 5 as next digit of the result. 
Result so far: 125329.5
Subtracting 2040 from 2370 leaves us with 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Let's proceed to step 10:
408 can be fit into 3300 8 times, resulting in a remainder of 36.
Record the quotient 8 as the next digit in the result. 
Result so far: 125329.58
Deduct 3264 from 3300 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 11:
If we divide 360 by 408, we get 0 and a remainder of 360.
The number 0 becomes the next digit in our result. 
Result so far: 125329.58
The remainder is 360 after subtracting 0 from 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 12:
If we divide 3600 by 408, we get 8 and a remainder of 336.
Record the quotient 8 as the next digit in the result. 
Result so far: 125329.5808
If we take 3264 away from 3600, we end up 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.

On to step 13:
408 can be fit into 3360 8 times, resulting in a remainder of 96.
Use 8 as the next digit of our solution. 
Result so far: 125329.58088
Deduct 3264 from 3360 and we're left 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 125329.58088 with a balance of 9.6e-05.