We look at the division of 85573843 by 663 
The aim is to understand the frequency of 663 in 85573843.

Going ahead to step 1:
When dividing 8 by 663, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (5) from the dividend, attach it to 8 and continue: 85 / 663

Step 2:
When dividing 85 by 663, we get 0 with a remainder of 85.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 85 to get 85.
Append the next digit (5) from the dividend to 85 and continue with: 855 / 663

Going ahead to step 3:
663 can be fit into 855 1 times, resulting in a remainder of 192.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 663 away from 855, we end up with 192.
Include the next digit (7) from the dividend after 192, then repeat: 1927 / 663

Moving on to step 4:
The number 663 fits into 1927 2 times, leaving a remainder of 601.
Write down 2 as next digit of the result. 
Result so far: 12.0
Deduct 1326 from 1927 and we're left with 601.
Bring next digit (3) of the dividend behind the 601 and repeat the process: 6013 / 663

Advancing to step 5:
The number 663 fits into 6013 9 times, leaving a remainder of 46.
The next digit of our result is 9. 
Result so far: 129.0
The remainder is 46 after subtracting 5967 from 6013.
Append the next digit (8) from the dividend to 46 and continue with: 468 / 663

Let's proceed to step 6:
If we divide 468 by 663, we get 0 and a remainder of 468.
The number 0 becomes the next digit in our result. 
Result so far: 1290.0
If we subtract 0 from 468, we get 468.
Grab the next digit (4) from the dividend, add it to 468, then carry on: 4684 / 663

On to step 7:
When dividing 4684 by 663, we get 7 with a remainder of 43.
The next digit of our result is 7. 
Result so far: 12907.0
Deduct 4641 from 4684 and we're left with 43.
Append the next digit (3) from the dividend to 43 and continue with: 433 / 663

Let's proceed to step 8:
663 goes into 433 0 times with a remainder of 433.
The next digit of our result is 0. 
Result so far: 129070.0
The remainder is 433 after subtracting 0 from 433.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4330, and continue the process.

Let's proceed to step 9:
4330 divided by 663 is 6 with a remainder of 352.
Use 6 as the next digit of our solution. 
Result so far: 129070.6
The remainder is 352 after subtracting 3978 from 4330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

Advancing to step 10:
When dividing 3520 by 663, we get 5 with a remainder of 205.
The number 5 becomes the next digit in our result. 
Result so far: 129070.65
Deduct 3315 from 3520 and we're left with 205.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

Moving on to step 11:
If we divide 2050 by 663, we get 3 and a remainder of 61.
Write down 3 as next digit of the result. 
Result so far: 129070.653
If we subtract 1989 from 2050, we get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 12:
If we divide 610 by 663, we get 0 and a remainder of 610.
The number 0 becomes the next digit in our result. 
Result so far: 129070.653
If we take 0 away from 610, we end up with 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6100, and continue the process.

Let's proceed to step 13:
6100 divided by 663 is 9 with a remainder of 133.
The number 9 becomes the next digit in our result. 
Result so far: 129070.65309
Subtract 5967 from 6100 to get 133.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1330, and continue the process.

Let's proceed to step 14:
The number 663 fits into 1330 2 times, leaving a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 129070.653092
Subtracting 1326 from 1330 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 15:
663 goes into 40 0 times with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 129070.653092
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 16:
If we divide 400 by 663, we get 0 and a remainder of 400.
Put 0 as the next digit of the answer. 
Result so far: 129070.653092
Subtract 0 from 400 to get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

In conclusion, the division gives 129070.653092 with a balance of 4e-07.