We look at the division of 747890 by 18 
The aim is to understand the frequency of 18 in 747890.

Step 1:
When dividing 7 by 18, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Grab the next digit (4) from the dividend, add it to 7, then carry on: 74 / 18

Going ahead to step 2:
The number 18 fits into 74 4 times, leaving a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we subtract 72 from 74, we get 2.
Append the next digit (7) from the dividend to 2 and continue with: 27 / 18

Let's proceed to step 3:
27 divided by 18 is 1 with a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 41.0
If we take 18 away from 27, we end up with 9.
Grab the next digit (8) from the dividend, add it to 9, then carry on: 98 / 18

Let's proceed to step 4:
98 divided by 18 is 5 with a remainder of 8.
Put 5 as the next digit of the answer. 
Result so far: 415.0
Subtracting 90 from 98 leaves us with 8.
Grab the next digit (9) from the dividend, add it to 8, then carry on: 89 / 18

Advancing to step 5:
18 goes into 89 4 times with a remainder of 17.
Record the quotient 4 as the next digit in the result. 
Result so far: 4154.0
The remainder is 17 after subtracting 72 from 89.
Grab the next digit (0) from the dividend, add it to 17, then carry on: 170 / 18

Going ahead to step 6:
When dividing 170 by 18, we get 9 with a remainder of 8.
The number 9 becomes the next digit in our result. 
Result so far: 41549.0
Subtract 162 from 170 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 7:
If we divide 80 by 18, we get 4 and a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 41549.4
Subtracting 72 from 80 leaves us 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.

Advancing to step 8:
18 goes into 80 4 times with a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 41549.44
The remainder is 8 after subtracting 72 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

In conclusion, the division gives 41549.44 with a balance of 0.008.