Let's divide 18511770 by 109
The aim is to understand the frequency of 109 in 18511770.

Advancing to step 1:
The number 109 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 109

On to step 2:
18 divided by 109 is 0 with a remainder of 18.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 18 to get 18.
Take the next digit (5) from the dividend and append it to 18, then repeat: 185 / 109

On to step 3:
109 can be fit into 185 1 times, resulting in a remainder of 76.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 76 after subtracting 109 from 185.
Take the next digit (1) from the dividend and append it to 76, then repeat: 761 / 109

Let's proceed to step 4:
109 can be fit into 761 6 times, resulting in a remainder of 107.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
Subtract 654 from 761 to get 107.
Append the next digit (1) from the dividend to 107 and continue with: 1071 / 109

Going ahead to step 5:
1071 divided by 109 is 9 with a remainder of 90.
Use 9 as the next digit of our solution. 
Result so far: 169.0
Subtract 981 from 1071 to get 90.
Append the next digit (7) from the dividend to 90 and continue with: 907 / 109

Advancing to step 6:
907 divided by 109 is 8 with a remainder of 35.
Record the quotient 8 as the next digit in the result. 
Result so far: 1698.0
Deduct 872 from 907 and we're left with 35.
Bring next digit (7) of the dividend behind the 35 and repeat the process: 357 / 109

Advancing to step 7:
When dividing 357 by 109, we get 3 with a remainder of 30.
Put 3 as the next digit of the answer. 
Result so far: 16983.0
If we subtract 327 from 357, we get 30.
Append the next digit (0) from the dividend to 30 and continue with: 300 / 109

On to step 8:
109 goes into 300 2 times with a remainder of 82.
The number 2 becomes the next digit in our result. 
Result so far: 169832.0
Subtract 218 from 300 to get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Advancing to step 9:
109 can be fit into 820 7 times, resulting in a remainder of 57.
The next digit of our result is 7. 
Result so far: 169832.7
Subtracting 763 from 820 leaves us with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Let's proceed to step 10:
109 goes into 570 5 times with a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 169832.75
Subtracting 545 from 570 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 11:
The number 109 fits into 250 2 times, leaving a remainder of 32.
Write down 2 as next digit of the result. 
Result so far: 169832.752
The remainder is 32 after subtracting 218 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 12:
When dividing 320 by 109, we get 2 with a remainder of 102.
Write down 2 as next digit of the result. 
Result so far: 169832.7522
Subtract 218 from 320 to get 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Our division results in 169832.7522 with a remaining 0.00102.