990899 ÷ 83 
The aim is to understand the frequency of 83 in 990899.

Step 1:
If we divide 9 by 83, we get 0 and a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 83

Advancing to step 2:
If we divide 99 by 83, we get 1 and a remainder of 16.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 83 from 99 to get 16.
Append the next digit (0) from the dividend to 16 and continue with: 160 / 83

Moving on to step 3:
If we divide 160 by 83, we get 1 and a remainder of 77.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Subtracting 83 from 160 leaves us with 77.
Include the next digit (8) from the dividend after 77, then repeat: 778 / 83

Going ahead to step 4:
When dividing 778 by 83, we get 9 with a remainder of 31.
The number 9 becomes the next digit in our result. 
Result so far: 119.0
Deduct 747 from 778 and we're left with 31.
Append the next digit (9) from the dividend to 31 and continue with: 319 / 83

On to step 5:
If we divide 319 by 83, we get 3 and a remainder of 70.
The number 3 becomes the next digit in our result. 
Result so far: 1193.0
If we subtract 249 from 319, we get 70.
Bring next digit (9) of the dividend behind the 70 and repeat the process: 709 / 83

Let's proceed to step 6:
709 divided by 83 is 8 with a remainder of 45.
Put 8 as the next digit of the answer. 
Result so far: 11938.0
Subtract 664 from 709 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Step 7:
If we divide 450 by 83, we get 5 and a remainder of 35.
The next digit of our result is 5. 
Result so far: 11938.5
Subtracting 415 from 450 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 8:
83 goes into 350 4 times with a remainder of 18.
Record the quotient 4 as the next digit in the result. 
Result so far: 11938.54
Subtract 332 from 350 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 9:
83 can be fit into 180 2 times, resulting in a remainder of 14.
Put 2 as the next digit of the answer. 
Result so far: 11938.542
Deduct 166 from 180 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 10:
If we divide 140 by 83, we get 1 and a remainder of 57.
Use 1 as the next digit of our solution. 
Result so far: 11938.5421
Subtract 83 from 140 to get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Going ahead to step 11:
The number 83 fits into 570 6 times, leaving a remainder of 72.
The next digit of our result is 6. 
Result so far: 11938.54216
Deduct 498 from 570 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Let's proceed to step 12:
The number 83 fits into 720 8 times, leaving a remainder of 56.
Write down 8 as next digit of the result. 
Result so far: 11938.542168
Subtracting 664 from 720 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Step 13:
The number 83 fits into 560 6 times, leaving a remainder of 62.
The number 6 becomes the next digit in our result. 
Result so far: 11938.5421686
If we subtract 498 from 560, we get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 14:
83 goes into 620 7 times with a remainder of 39.
Record the quotient 7 as the next digit in the result. 
Result so far: 11938.54216867
Subtract 581 from 620 to get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

The quotient of the division is 11938.54216867, and the remainder is 3.9e-08.