51033478 ÷ 663 
The aim is to understand the frequency of 663 in 51033478.

Advancing to step 1:
663 goes into 5 0 times with 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 / 663

Advancing to step 2:
The number 663 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
The remainder is 51 after subtracting 0 from 51.
Include the next digit (0) from the dividend after 51, then repeat: 510 / 663

On to step 3:
If we divide 510 by 663, we get 0 and a remainder of 510.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 510 after subtracting 0 from 510.
Bring next digit (3) of the dividend behind the 510 and repeat the process: 5103 / 663

Step 4:
5103 divided by 663 is 7 with a remainder of 462.
The next digit of our result is 7. 
Result so far: 7.0
Subtracting 4641 from 5103 leaves us with 462.
Grab the next digit (3) from the dividend, add it to 462, then carry on: 4623 / 663

Step 5:
The number 663 fits into 4623 6 times, leaving a remainder of 645.
The next digit of our result is 6. 
Result so far: 76.0
Subtract 3978 from 4623 to get 645.
Take the next digit (4) from the dividend and append it to 645, then repeat: 6454 / 663

Going ahead to step 6:
The number 663 fits into 6454 9 times, leaving a remainder of 487.
Use 9 as the next digit of our solution. 
Result so far: 769.0
Subtract 5967 from 6454 to get 487.
Fetch the next digit (7) from the dividend, attach it to 487 and continue: 4877 / 663

On to step 7:
If we divide 4877 by 663, we get 7 and a remainder of 236.
The next digit of our result is 7. 
Result so far: 7697.0
Deduct 4641 from 4877 and we're left with 236.
Take the next digit (8) from the dividend and append it to 236, then repeat: 2368 / 663

Advancing to step 8:
663 goes into 2368 3 times with a remainder of 379.
Use 3 as the next digit of our solution. 
Result so far: 76973.0
If we take 1989 away from 2368, we end up with 379.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3790, and continue the process.

Going ahead to step 9:
When dividing 3790 by 663, we get 5 with a remainder of 475.
The number 5 becomes the next digit in our result. 
Result so far: 76973.5
If we take 3315 away from 3790, we end up with 475.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4750, and continue the process.

Going ahead to step 10:
4750 divided by 663 is 7 with a remainder of 109.
The next digit of our result is 7. 
Result so far: 76973.57
If we subtract 4641 from 4750, we get 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

Let's proceed to step 11:
1090 divided by 663 is 1 with a remainder of 427.
Put 1 as the next digit of the answer. 
Result so far: 76973.571
If we subtract 663 from 1090, we get 427.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4270, and continue the process.

On to step 12:
If we divide 4270 by 663, we get 6 and a remainder of 292.
The number 6 becomes the next digit in our result. 
Result so far: 76973.5716
Subtracting 3978 from 4270 leaves us with 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Moving on to step 13:
2920 divided by 663 is 4 with a remainder of 268.
Write down 4 as next digit of the result. 
Result so far: 76973.57164
If we take 2652 away from 2920, we end up with 268.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2680, and continue the process.

Let's proceed to step 14:
663 can be fit into 2680 4 times, resulting in a remainder of 28.
Record the quotient 4 as the next digit in the result. 
Result so far: 76973.571644
If we subtract 2652 from 2680, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Our division results in 76973.571644 with a remaining 2.8e-06.