We're dividing 30986109 by 210 
The aim is to understand the frequency of 210 in 30986109.

Going ahead to step 1:
When dividing 3 by 210, we get 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 210

Let's proceed to step 2:
210 goes into 30 0 times with a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 30 to get 30.
Include the next digit (9) from the dividend after 30, then repeat: 309 / 210

Moving on to step 3:
The number 210 fits into 309 1 times, leaving a remainder of 99.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 210 from 309 and we're left with 99.
Take the next digit (8) from the dividend and append it to 99, then repeat: 998 / 210

Let's proceed to step 4:
The number 210 fits into 998 4 times, leaving a remainder of 158.
The next digit of our result is 4. 
Result so far: 14.0
The remainder is 158 after subtracting 840 from 998.
Include the next digit (6) from the dividend after 158, then repeat: 1586 / 210

Advancing to step 5:
The number 210 fits into 1586 7 times, leaving a remainder of 116.
Put 7 as the next digit of the answer. 
Result so far: 147.0
Subtracting 1470 from 1586 leaves us with 116.
Append the next digit (1) from the dividend to 116 and continue with: 1161 / 210

Step 6:
210 goes into 1161 5 times with a remainder of 111.
The number 5 becomes the next digit in our result. 
Result so far: 1475.0
Subtract 1050 from 1161 to get 111.
Take the next digit (0) from the dividend and append it to 111, then repeat: 1110 / 210

Step 7:
The number 210 fits into 1110 5 times, leaving a remainder of 60.
The next digit of our result is 5. 
Result so far: 14755.0
If we subtract 1050 from 1110, we get 60.
Fetch the next digit (9) from the dividend, attach it to 60 and continue: 609 / 210

Moving on to step 8:
210 can be fit into 609 2 times, resulting in a remainder of 189.
Put 2 as the next digit of the answer. 
Result so far: 147552.0
If we take 420 away from 609, we end up with 189.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1890, and continue the process.

Moving on to step 9:
210 goes into 1890 9 times with a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 147552.9
If we take 1890 away from 1890, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 10:
210 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 147552.9
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 11:
0 divided by 210 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 147552.9
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 147552.9, with a leftover of 0.0.