We look at the division of 31099073 by 210 
The aim is to understand the frequency of 210 in 31099073.

On to step 1:
If we divide 3 by 210, we get 0 and a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Include the next digit (1) from the dividend after 3, then repeat: 31 / 210

Step 2:
The number 210 fits into 31 0 times, leaving a remainder of 31.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 31 to get 31.
Include the next digit (0) from the dividend after 31, then repeat: 310 / 210

Going ahead to step 3:
210 goes into 310 1 times with a remainder of 100.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 100 after subtracting 210 from 310.
Bring next digit (9) of the dividend behind the 100 and repeat the process: 1009 / 210

Going ahead to step 4:
When dividing 1009 by 210, we get 4 with a remainder of 169.
The next digit of our result is 4. 
Result so far: 14.0
The remainder is 169 after subtracting 840 from 1009.
Take the next digit (9) from the dividend and append it to 169, then repeat: 1699 / 210

Step 5:
When dividing 1699 by 210, we get 8 with a remainder of 19.
Write down 8 as next digit of the result. 
Result so far: 148.0
The remainder is 19 after subtracting 1680 from 1699.
Take the next digit (0) from the dividend and append it to 19, then repeat: 190 / 210

Going ahead to step 6:
190 divided by 210 is 0 with a remainder of 190.
The next digit of our result is 0. 
Result so far: 1480.0
If we subtract 0 from 190, we get 190.
Take the next digit (7) from the dividend and append it to 190, then repeat: 1907 / 210

On to step 7:
210 can be fit into 1907 9 times, resulting in a remainder of 17.
Write down 9 as next digit of the result. 
Result so far: 14809.0
If we subtract 1890 from 1907, we get 17.
Fetch the next digit (3) from the dividend, attach it to 17 and continue: 173 / 210

Moving on to step 8:
When dividing 173 by 210, we get 0 with a remainder of 173.
The number 0 becomes the next digit in our result. 
Result so far: 148090.0
The remainder is 173 after subtracting 0 from 173.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1730, and continue the process.

Step 9:
If we divide 1730 by 210, we get 8 and a remainder of 50.
Put 8 as the next digit of the answer. 
Result so far: 148090.8
If we take 1680 away from 1730, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 10:
500 divided by 210 is 2 with a remainder of 80.
The next digit of our result is 2. 
Result so far: 148090.82
Subtract 420 from 500 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 11:
When dividing 800 by 210, we get 3 with a remainder of 170.
The next digit of our result is 3. 
Result so far: 148090.823
Deduct 630 from 800 and we're left with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Moving on to step 12:
1700 divided by 210 is 8 with a remainder of 20.
Record the quotient 8 as the next digit in the result. 
Result so far: 148090.8238
Deduct 1680 from 1700 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 13:
210 can be fit into 200 0 times, resulting in a remainder of 200.
The number 0 becomes the next digit in our result. 
Result so far: 148090.8238
Subtracting 0 from 200 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 14:
The number 210 fits into 2000 9 times, leaving a remainder of 110.
Put 9 as the next digit of the answer. 
Result so far: 148090.823809
Deduct 1890 from 2000 and we're left with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Let's proceed to step 15:
When dividing 1100 by 210, we get 5 with a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 148090.8238095
The remainder is 50 after subtracting 1050 from 1100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 16:
500 divided by 210 is 2 with a remainder of 80.
Use 2 as the next digit of our solution. 
Result so far: 148090.82380952
Subtract 420 from 500 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

In conclusion, the division gives 148090.82380952 with a balance of 8e-08.