We look at the division of 51780068 by 808 
The aim is to understand the frequency of 808 in 51780068.

Moving on to step 1:
If we divide 5 by 808, we get 0 and a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 808

Moving on to step 2:
If we divide 51 by 808, we get 0 and a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Grab the next digit (7) from the dividend, add it to 51, then carry on: 517 / 808

On to step 3:
517 divided by 808 is 0 with a remainder of 517.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 517, we end up with 517.
Grab the next digit (8) from the dividend, add it to 517, then carry on: 5178 / 808

Advancing to step 4:
808 goes into 5178 6 times with a remainder of 330.
Use 6 as the next digit of our solution. 
Result so far: 6.0
The remainder is 330 after subtracting 4848 from 5178.
Take the next digit (0) from the dividend and append it to 330, then repeat: 3300 / 808

Step 5:
When dividing 3300 by 808, we get 4 with a remainder of 68.
The number 4 becomes the next digit in our result. 
Result so far: 64.0
Deduct 3232 from 3300 and we're left with 68.
Fetch the next digit (0) from the dividend, attach it to 68 and continue: 680 / 808

On to step 6:
808 can be fit into 680 0 times, resulting in a remainder of 680.
Record the quotient 0 as the next digit in the result. 
Result so far: 640.0
If we subtract 0 from 680, we get 680.
Grab the next digit (6) from the dividend, add it to 680, then carry on: 6806 / 808

Going ahead to step 7:
808 goes into 6806 8 times with a remainder of 342.
Put 8 as the next digit of the answer. 
Result so far: 6408.0
If we subtract 6464 from 6806, we get 342.
Append the next digit (8) from the dividend to 342 and continue with: 3428 / 808

Step 8:
The number 808 fits into 3428 4 times, leaving a remainder of 196.
The next digit of our result is 4. 
Result so far: 64084.0
If we take 3232 away from 3428, we end up with 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Advancing to step 9:
The number 808 fits into 1960 2 times, leaving a remainder of 344.
The number 2 becomes the next digit in our result. 
Result so far: 64084.2
Deduct 1616 from 1960 and we're left with 344.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

On to step 10:
When dividing 3440 by 808, we get 4 with a remainder of 208.
The next digit of our result is 4. 
Result so far: 64084.24
Subtracting 3232 from 3440 leaves us with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Going ahead to step 11:
2080 divided by 808 is 2 with a remainder of 464.
Record the quotient 2 as the next digit in the result. 
Result so far: 64084.242
Subtracting 1616 from 2080 leaves us with 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

Going ahead to step 12:
When dividing 4640 by 808, we get 5 with a remainder of 600.
The number 5 becomes the next digit in our result. 
Result so far: 64084.2425
If we take 4040 away from 4640, we end up with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Advancing to step 13:
6000 divided by 808 is 7 with a remainder of 344.
The next digit of our result is 7. 
Result so far: 64084.24257
The remainder is 344 after subtracting 5656 from 6000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

Going ahead to step 14:
3440 divided by 808 is 4 with a remainder of 208.
The next digit of our result is 4. 
Result so far: 64084.242574
The remainder is 208 after subtracting 3232 from 3440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Step 15:
If we divide 2080 by 808, we get 2 and a remainder of 464.
Use 2 as the next digit of our solution. 
Result so far: 64084.2425742
Subtracting 1616 from 2080 leaves us with 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

Going ahead to step 16:
808 goes into 4640 5 times with a remainder of 600.
Write down 5 as next digit of the result. 
Result so far: 64084.24257425
The remainder is 600 after subtracting 4040 from 4640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

The final result is 64084.24257425 with a remainder of 6e-07.