99855481 ÷ 640 
The aim is to understand the frequency of 640 in 99855481.

Moving on to step 1:
640 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 640

Let's proceed to step 2:
99 divided by 640 is 0 with a remainder of 99.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 99, we end up with 99.
Fetch the next digit (8) from the dividend, attach it to 99 and continue: 998 / 640

Let's proceed to step 3:
998 divided by 640 is 1 with a remainder of 358.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 640 from 998 to get 358.
Bring next digit (5) of the dividend behind the 358 and repeat the process: 3585 / 640

Going ahead to step 4:
The number 640 fits into 3585 5 times, leaving a remainder of 385.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Deduct 3200 from 3585 and we're left with 385.
Bring next digit (5) of the dividend behind the 385 and repeat the process: 3855 / 640

On to step 5:
640 goes into 3855 6 times with a remainder of 15.
Use 6 as the next digit of our solution. 
Result so far: 156.0
The remainder is 15 after subtracting 3840 from 3855.
Bring next digit (4) of the dividend behind the 15 and repeat the process: 154 / 640

On to step 6:
640 can be fit into 154 0 times, resulting in a remainder of 154.
Record the quotient 0 as the next digit in the result. 
Result so far: 1560.0
Deduct 0 from 154 and we're left with 154.
Grab the next digit (8) from the dividend, add it to 154, then carry on: 1548 / 640

Moving on to step 7:
640 goes into 1548 2 times with a remainder of 268.
Write down 2 as next digit of the result. 
Result so far: 15602.0
If we subtract 1280 from 1548, we get 268.
Bring next digit (1) of the dividend behind the 268 and repeat the process: 2681 / 640

Going ahead to step 8:
640 can be fit into 2681 4 times, resulting in a remainder of 121.
Put 4 as the next digit of the answer. 
Result so far: 156024.0
Subtract 2560 from 2681 to get 121.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1210, and continue the process.

Advancing to step 9:
If we divide 1210 by 640, we get 1 and a remainder of 570.
Use 1 as the next digit of our solution. 
Result so far: 156024.1
Subtracting 640 from 1210 leaves us with 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5700, and continue the process.

Advancing to step 10:
5700 divided by 640 is 8 with a remainder of 580.
Record the quotient 8 as the next digit in the result. 
Result so far: 156024.18
Subtract 5120 from 5700 to get 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

Advancing to step 11:
640 goes into 5800 9 times with a remainder of 40.
The number 9 becomes the next digit in our result. 
Result so far: 156024.189
If we subtract 5760 from 5800, we get 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 12:
640 goes into 400 0 times with a remainder of 400.
The next digit of our result is 0. 
Result so far: 156024.189
The remainder is 400 after subtracting 0 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Going ahead to step 13:
The number 640 fits into 4000 6 times, leaving a remainder of 160.
Write down 6 as next digit of the result. 
Result so far: 156024.18906
Subtracting 3840 from 4000 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Advancing to step 14:
1600 divided by 640 is 2 with a remainder of 320.
Put 2 as the next digit of the answer. 
Result so far: 156024.189062
If we subtract 1280 from 1600, we get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

On to step 15:
If we divide 3200 by 640, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 156024.1890625
Subtracting 3200 from 3200 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 16:
0 divided by 640 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 156024.1890625
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 156024.1890625 with a balance of 0.0.