28959364 ÷ 823 
The aim is to understand the frequency of 823 in 28959364.

Step 1:
If we divide 2 by 823, we get 0 and a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Take the next digit (8) from the dividend and append it to 2, then repeat: 28 / 823

On to step 2:
The number 823 fits into 28 0 times, leaving a remainder of 28.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 28 and we're left with 28.
Take the next digit (9) from the dividend and append it to 28, then repeat: 289 / 823

Going ahead to step 3:
When dividing 289 by 823, we get 0 with a remainder of 289.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 289 and we're left with 289.
Grab the next digit (5) from the dividend, add it to 289, then carry on: 2895 / 823

Step 4:
The number 823 fits into 2895 3 times, leaving a remainder of 426.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 2469 from 2895 leaves us with 426.
Grab the next digit (9) from the dividend, add it to 426, then carry on: 4269 / 823

Advancing to step 5:
When dividing 4269 by 823, we get 5 with a remainder of 154.
The next digit of our result is 5. 
Result so far: 35.0
The remainder is 154 after subtracting 4115 from 4269.
Include the next digit (3) from the dividend after 154, then repeat: 1543 / 823

Moving on to step 6:
1543 divided by 823 is 1 with a remainder of 720.
The number 1 becomes the next digit in our result. 
Result so far: 351.0
If we subtract 823 from 1543, we get 720.
Fetch the next digit (6) from the dividend, attach it to 720 and continue: 7206 / 823

Let's proceed to step 7:
When dividing 7206 by 823, we get 8 with a remainder of 622.
Put 8 as the next digit of the answer. 
Result so far: 3518.0
The remainder is 622 after subtracting 6584 from 7206.
Take the next digit (4) from the dividend and append it to 622, then repeat: 6224 / 823

Let's proceed to step 8:
823 can be fit into 6224 7 times, resulting in a remainder of 463.
Write down 7 as next digit of the result. 
Result so far: 35187.0
Subtracting 5761 from 6224 leaves us with 463.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4630, and continue the process.

Advancing to step 9:
823 can be fit into 4630 5 times, resulting in a remainder of 515.
Record the quotient 5 as the next digit in the result. 
Result so far: 35187.5
If we subtract 4115 from 4630, we get 515.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5150, and continue the process.

Going ahead to step 10:
If we divide 5150 by 823, we get 6 and a remainder of 212.
The number 6 becomes the next digit in our result. 
Result so far: 35187.56
Subtracting 4938 from 5150 leaves us with 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Step 11:
The number 823 fits into 2120 2 times, leaving a remainder of 474.
Use 2 as the next digit of our solution. 
Result so far: 35187.562
If we subtract 1646 from 2120, we get 474.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4740, and continue the process.

Step 12:
When dividing 4740 by 823, we get 5 with a remainder of 625.
Write down 5 as next digit of the result. 
Result so far: 35187.5625
If we take 4115 away from 4740, we end up with 625.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6250, and continue the process.

Moving on to step 13:
If we divide 6250 by 823, we get 7 and a remainder of 489.
Write down 7 as next digit of the result. 
Result so far: 35187.56257
Deduct 5761 from 6250 and we're left with 489.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4890, and continue the process.

Moving on to step 14:
The number 823 fits into 4890 5 times, leaving a remainder of 775.
Put 5 as the next digit of the answer. 
Result so far: 35187.562575
If we subtract 4115 from 4890, we get 775.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7750, and continue the process.

Let's proceed to step 15:
When dividing 7750 by 823, we get 9 with a remainder of 343.
The number 9 becomes the next digit in our result. 
Result so far: 35187.5625759
If we subtract 7407 from 7750, we get 343.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3430, and continue the process.

Moving on to step 16:
If we divide 3430 by 823, we get 4 and a remainder of 138.
Use 4 as the next digit of our solution. 
Result so far: 35187.56257594
Deduct 3292 from 3430 and we're left with 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

After the division, we end up with 35187.56257594 and a remainder of 1.38e-07.