72450653 ÷ 210 
The aim is to understand the frequency of 210 in 72450653.

Let's proceed to step 1:
If we divide 7 by 210, we get 0 and a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 210

Step 2:
When dividing 72 by 210, we get 0 with a remainder of 72.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 72 and we're left with 72.
Include the next digit (4) from the dividend after 72, then repeat: 724 / 210

Going ahead to step 3:
724 divided by 210 is 3 with a remainder of 94.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
The remainder is 94 after subtracting 630 from 724.
Grab the next digit (5) from the dividend, add it to 94, then carry on: 945 / 210

Advancing to step 4:
The number 210 fits into 945 4 times, leaving a remainder of 105.
Record the quotient 4 as the next digit in the result. 
Result so far: 34.0
If we take 840 away from 945, we end up with 105.
Take the next digit (0) from the dividend and append it to 105, then repeat: 1050 / 210

Let's proceed to step 5:
When dividing 1050 by 210, we get 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 345.0
If we take 1050 away from 1050, we end up with 0.
Include the next digit (6) from the dividend after 0, then repeat: 6 / 210

Let's proceed to step 6:
210 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 3450.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (5) of the dividend behind the 6 and repeat the process: 65 / 210

Let's proceed to step 7:
210 can be fit into 65 0 times, resulting in a remainder of 65.
Record the quotient 0 as the next digit in the result. 
Result so far: 34500.0
Subtract 0 from 65 to get 65.
Append the next digit (3) from the dividend to 65 and continue with: 653 / 210

Moving on to step 8:
When dividing 653 by 210, we get 3 with a remainder of 23.
The next digit of our result is 3. 
Result so far: 345003.0
If we take 630 away from 653, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

On to step 9:
If we divide 230 by 210, we get 1 and a remainder of 20.
Record the quotient 1 as the next digit in the result. 
Result so far: 345003.1
If we subtract 210 from 230, we get 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 10:
If we divide 200 by 210, we get 0 and a remainder of 200.
Write down 0 as next digit of the result. 
Result so far: 345003.1
If we take 0 away from 200, we end up 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.

Moving on to step 11:
2000 divided by 210 is 9 with a remainder of 110.
Put 9 as the next digit of the answer. 
Result so far: 345003.109
Subtract 1890 from 2000 to get 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 12:
The number 210 fits into 1100 5 times, leaving a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 345003.1095
Deduct 1050 from 1100 and we're left 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.

Step 13:
If we divide 500 by 210, we get 2 and a remainder of 80.
Write down 2 as next digit of the result. 
Result so far: 345003.10952
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.

Moving on to step 14:
210 can be fit into 800 3 times, resulting in a remainder of 170.
The next digit of our result is 3. 
Result so far: 345003.109523
If we take 630 away from 800, we end up 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.

Going ahead to step 15:
210 goes into 1700 8 times with a remainder of 20.
The number 8 becomes the next digit in our result. 
Result so far: 345003.1095238
If we subtract 1680 from 1700, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 16:
When dividing 200 by 210, we get 0 with a remainder of 200.
The next digit of our result is 0. 
Result so far: 345003.1095238
If we subtract 0 from 200, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

After the division, we end up with 345003.1095238 and a remainder of 2e-07.