643533 ÷ 83 
The aim is to understand the frequency of 83 in 643533.

Step 1:
The number 83 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 83

Advancing to step 2:
83 goes into 64 0 times with a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Append the next digit (3) from the dividend to 64 and continue with: 643 / 83

Step 3:
When dividing 643 by 83, we get 7 with a remainder of 62.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtracting 581 from 643 leaves us with 62.
Bring next digit (5) of the dividend behind the 62 and repeat the process: 625 / 83

Let's proceed to step 4:
83 can be fit into 625 7 times, resulting in a remainder of 44.
Record the quotient 7 as the next digit in the result. 
Result so far: 77.0
If we subtract 581 from 625, we get 44.
Bring next digit (3) of the dividend behind the 44 and repeat the process: 443 / 83

Advancing to step 5:
When dividing 443 by 83, we get 5 with a remainder of 28.
Write down 5 as next digit of the result. 
Result so far: 775.0
Subtract 415 from 443 to get 28.
Fetch the next digit (3) from the dividend, attach it to 28 and continue: 283 / 83

Step 6:
283 divided by 83 is 3 with a remainder of 34.
Write down 3 as next digit of the result. 
Result so far: 7753.0
If we take 249 away from 283, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 7:
83 goes into 340 4 times with a remainder of 8.
The next digit of our result is 4. 
Result so far: 7753.4
Deduct 332 from 340 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 8:
83 can be fit into 80 0 times, resulting in a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 7753.4
If we take 0 away from 80, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 9:
The number 83 fits into 800 9 times, leaving a remainder of 53.
Record the quotient 9 as the next digit in the result. 
Result so far: 7753.409
Subtracting 747 from 800 leaves us with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

On to step 10:
When dividing 530 by 83, we get 6 with a remainder of 32.
Put 6 as the next digit of the answer. 
Result so far: 7753.4096
Subtract 498 from 530 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 11:
83 can be fit into 320 3 times, resulting in a remainder of 71.
Use 3 as the next digit of our solution. 
Result so far: 7753.40963
Deduct 249 from 320 and we're left with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Advancing to step 12:
83 goes into 710 8 times with a remainder of 46.
The next digit of our result is 8. 
Result so far: 7753.409638
If we take 664 away from 710, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 13:
If we divide 460 by 83, we get 5 and a remainder of 45.
Write down 5 as next digit of the result. 
Result so far: 7753.4096385
Subtract 415 from 460 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.

Going ahead to step 14:
If we divide 450 by 83, we get 5 and a remainder of 35.
The number 5 becomes the next digit in our result. 
Result so far: 7753.40963855
Subtract 415 from 450 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

In conclusion, the division gives 7753.40963855 with a balance of 3.5e-08.