2516729 ÷ 210 
The aim is to understand the frequency of 210 in 2516729.

Going ahead to step 1:
When dividing 2 by 210, we get 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 210

On to step 2:
25 divided by 210 is 0 with a remainder of 25.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 25 after subtracting 0 from 25.
Bring next digit (1) of the dividend behind the 25 and repeat the process: 251 / 210

Let's proceed to step 3:
If we divide 251 by 210, we get 1 and a remainder of 41.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 41 after subtracting 210 from 251.
Include the next digit (6) from the dividend after 41, then repeat: 416 / 210

Step 4:
210 can be fit into 416 1 times, resulting in a remainder of 206.
Write down 1 as next digit of the result. 
Result so far: 11.0
Deduct 210 from 416 and we're left with 206.
Append the next digit (7) from the dividend to 206 and continue with: 2067 / 210

Moving on to step 5:
When dividing 2067 by 210, we get 9 with a remainder of 177.
Use 9 as the next digit of our solution. 
Result so far: 119.0
Subtracting 1890 from 2067 leaves us with 177.
Grab the next digit (2) from the dividend, add it to 177, then carry on: 1772 / 210

Going ahead to step 6:
210 goes into 1772 8 times with a remainder of 92.
Record the quotient 8 as the next digit in the result. 
Result so far: 1198.0
If we subtract 1680 from 1772, we get 92.
Grab the next digit (9) from the dividend, add it to 92, then carry on: 929 / 210

Step 7:
The number 210 fits into 929 4 times, leaving a remainder of 89.
The next digit of our result is 4. 
Result so far: 11984.0
If we subtract 840 from 929, we get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Let's proceed to step 8:
210 can be fit into 890 4 times, resulting in a remainder of 50.
Write down 4 as next digit of the result. 
Result so far: 11984.4
The remainder is 50 after subtracting 840 from 890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 9:
When dividing 500 by 210, we get 2 with a remainder of 80.
Record the quotient 2 as the next digit in the result. 
Result so far: 11984.42
Deduct 420 from 500 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 10:
The number 210 fits into 800 3 times, leaving a remainder of 170.
The next digit of our result is 3. 
Result so far: 11984.423
The remainder is 170 after subtracting 630 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Step 11:
210 can be fit into 1700 8 times, resulting in a remainder of 20.
Use 8 as the next digit of our solution. 
Result so far: 11984.4238
If we take 1680 away from 1700, we end up 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.

Let's proceed to step 12:
The number 210 fits into 200 0 times, leaving a remainder of 200.
Use 0 as the next digit of our solution. 
Result so far: 11984.4238
Deduct 0 from 200 and we're left 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.

Going ahead to step 13:
When dividing 2000 by 210, we get 9 with a remainder of 110.
The next digit of our result is 9. 
Result so far: 11984.423809
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.

On to step 14:
210 can be fit into 1100 5 times, resulting in a remainder of 50.
The next digit of our result is 5. 
Result so far: 11984.4238095
If we take 1050 away from 1100, 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.

Let's proceed to step 15:
When dividing 500 by 210, we get 2 with a remainder of 80.
The next digit of our result is 2. 
Result so far: 11984.42380952
If we subtract 420 from 500, we 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.

The quotient of the division is 11984.42380952, and the remainder is 8e-08.