We look at the division of 18349309 by 210 
The aim is to understand the frequency of 210 in 18349309.

Advancing to step 1:
210 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 210

Step 2:
210 can be fit into 18 0 times, resulting in a remainder of 18.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 18, we get 18.
Append the next digit (3) from the dividend to 18 and continue with: 183 / 210

Let's proceed to step 3:
210 goes into 183 0 times with a remainder of 183.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 183 leaves us with 183.
Fetch the next digit (4) from the dividend, attach it to 183 and continue: 1834 / 210

On to step 4:
1834 divided by 210 is 8 with a remainder of 154.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 154 after subtracting 1680 from 1834.
Include the next digit (9) from the dividend after 154, then repeat: 1549 / 210

Let's proceed to step 5:
If we divide 1549 by 210, we get 7 and a remainder of 79.
Write down 7 as next digit of the result. 
Result so far: 87.0
Subtract 1470 from 1549 to get 79.
Take the next digit (3) from the dividend and append it to 79, then repeat: 793 / 210

Step 6:
793 divided by 210 is 3 with a remainder of 163.
The next digit of our result is 3. 
Result so far: 873.0
If we subtract 630 from 793, we get 163.
Fetch the next digit (0) from the dividend, attach it to 163 and continue: 1630 / 210

Moving on to step 7:
When dividing 1630 by 210, we get 7 with a remainder of 160.
Record the quotient 7 as the next digit in the result. 
Result so far: 8737.0
If we subtract 1470 from 1630, we get 160.
Include the next digit (9) from the dividend after 160, then repeat: 1609 / 210

Step 8:
210 can be fit into 1609 7 times, resulting in a remainder of 139.
The number 7 becomes the next digit in our result. 
Result so far: 87377.0
Subtracting 1470 from 1609 leaves us with 139.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1390, and continue the process.

Let's proceed to step 9:
When dividing 1390 by 210, we get 6 with a remainder of 130.
The number 6 becomes the next digit in our result. 
Result so far: 87377.6
If we take 1260 away from 1390, we end up with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

On to step 10:
210 goes into 1300 6 times with a remainder of 40.
Record the quotient 6 as the next digit in the result. 
Result so far: 87377.66
The remainder is 40 after subtracting 1260 from 1300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The quotient of the division is 87377.66, and the remainder is 0.04.