Let's divide 623409 by 83
The aim is to understand the frequency of 83 in 623409.

Going ahead to step 1:
When dividing 6 by 83, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (2) from the dividend after 6, then repeat: 62 / 83

On to step 2:
83 goes into 62 0 times with a remainder of 62.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 62, we end up with 62.
Take the next digit (3) from the dividend and append it to 62, then repeat: 623 / 83

On to step 3:
The number 83 fits into 623 7 times, leaving a remainder of 42.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Deduct 581 from 623 and we're left with 42.
Include the next digit (4) from the dividend after 42, then repeat: 424 / 83

On to step 4:
The number 83 fits into 424 5 times, leaving a remainder of 9.
Put 5 as the next digit of the answer. 
Result so far: 75.0
The remainder is 9 after subtracting 415 from 424.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 83

Advancing to step 5:
90 divided by 83 is 1 with a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 751.0
The remainder is 7 after subtracting 83 from 90.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 83

Advancing to step 6:
83 can be fit into 79 0 times, resulting in a remainder of 79.
Write down 0 as next digit of the result. 
Result so far: 7510.0
The remainder is 79 after subtracting 0 from 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Step 7:
When dividing 790 by 83, we get 9 with a remainder of 43.
Put 9 as the next digit of the answer. 
Result so far: 7510.9
Subtracting 747 from 790 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Moving on to step 8:
When dividing 430 by 83, we get 5 with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 7510.95
Deduct 415 from 430 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 9:
When dividing 150 by 83, we get 1 with a remainder of 67.
The number 1 becomes the next digit in our result. 
Result so far: 7510.951
If we take 83 away from 150, we end up with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Step 10:
If we divide 670 by 83, we get 8 and a remainder of 6.
Put 8 as the next digit of the answer. 
Result so far: 7510.9518
If we take 664 away from 670, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 11:
The number 83 fits into 60 0 times, leaving a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 7510.9518
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 12:
83 can be fit into 600 7 times, resulting in a remainder of 19.
Use 7 as the next digit of our solution. 
Result so far: 7510.951807
The remainder is 19 after subtracting 581 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 13:
The number 83 fits into 190 2 times, leaving a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 7510.9518072
Deduct 166 from 190 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 14:
83 can be fit into 240 2 times, resulting in a remainder of 74.
Put 2 as the next digit of the answer. 
Result so far: 7510.95180722
If we subtract 166 from 240, we get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

The final outcome is 7510.95180722, with a leftover of 7.4e-08.