Let's divide 18198311 by 623
The aim is to understand the frequency of 623 in 18198311.

Going ahead to step 1:
623 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 623

Going ahead to step 2:
When dividing 18 by 623, we get 0 with a remainder of 18.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 18 leaves us with 18.
Fetch the next digit (1) from the dividend, attach it to 18 and continue: 181 / 623

Going ahead to step 3:
When dividing 181 by 623, we get 0 with a remainder of 181.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 181 and we're left with 181.
Bring next digit (9) of the dividend behind the 181 and repeat the process: 1819 / 623

Going ahead to step 4:
The number 623 fits into 1819 2 times, leaving a remainder of 573.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 1246 from 1819 leaves us with 573.
Append the next digit (8) from the dividend to 573 and continue with: 5738 / 623

Going ahead to step 5:
5738 divided by 623 is 9 with a remainder of 131.
The number 9 becomes the next digit in our result. 
Result so far: 29.0
Subtract 5607 from 5738 to get 131.
Fetch the next digit (3) from the dividend, attach it to 131 and continue: 1313 / 623

Moving on to step 6:
1313 divided by 623 is 2 with a remainder of 67.
Record the quotient 2 as the next digit in the result. 
Result so far: 292.0
Deduct 1246 from 1313 and we're left with 67.
Append the next digit (1) from the dividend to 67 and continue with: 671 / 623

Going ahead to step 7:
If we divide 671 by 623, we get 1 and a remainder of 48.
Record the quotient 1 as the next digit in the result. 
Result so far: 2921.0
Subtract 623 from 671 to get 48.
Fetch the next digit (1) from the dividend, attach it to 48 and continue: 481 / 623

Going ahead to step 8:
If we divide 481 by 623, we get 0 and a remainder of 481.
Use 0 as the next digit of our solution. 
Result so far: 29210.0
The remainder is 481 after subtracting 0 from 481.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4810, and continue the process.

Going ahead to step 9:
When dividing 4810 by 623, we get 7 with a remainder of 449.
Write down 7 as next digit of the result. 
Result so far: 29210.7
If we take 4361 away from 4810, we end up with 449.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4490, and continue the process.

Step 10:
4490 divided by 623 is 7 with a remainder of 129.
The number 7 becomes the next digit in our result. 
Result so far: 29210.77
If we take 4361 away from 4490, we end up with 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

After the division, we end up with 29210.77 and a remainder of 0.129.