89253708 divided by 210 
The aim is to understand the frequency of 210 in 89253708.

Moving on to step 1:
210 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (9) of the dividend behind the 8 and repeat the process: 89 / 210

Advancing to step 2:
When dividing 89 by 210, we get 0 with a remainder of 89.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 89, we end up with 89.
Grab the next digit (2) from the dividend, add it to 89, then carry on: 892 / 210

On to step 3:
The number 210 fits into 892 4 times, leaving a remainder of 52.
Put 4 as the next digit of the answer. 
Result so far: 4.0
The remainder is 52 after subtracting 840 from 892.
Append the next digit (5) from the dividend to 52 and continue with: 525 / 210

Going ahead to step 4:
210 can be fit into 525 2 times, resulting in a remainder of 105.
Use 2 as the next digit of our solution. 
Result so far: 42.0
Subtracting 420 from 525 leaves us with 105.
Fetch the next digit (3) from the dividend, attach it to 105 and continue: 1053 / 210

Step 5:
When dividing 1053 by 210, we get 5 with a remainder of 3.
Write down 5 as next digit of the result. 
Result so far: 425.0
Subtracting 1050 from 1053 leaves us with 3.
Fetch the next digit (7) from the dividend, attach it to 3 and continue: 37 / 210

On to step 6:
210 can be fit into 37 0 times, resulting in a remainder of 37.
The number 0 becomes the next digit in our result. 
Result so far: 4250.0
Subtract 0 from 37 to get 37.
Fetch the next digit (0) from the dividend, attach it to 37 and continue: 370 / 210

Advancing to step 7:
If we divide 370 by 210, we get 1 and a remainder of 160.
Use 1 as the next digit of our solution. 
Result so far: 42501.0
Deduct 210 from 370 and we're left with 160.
Take the next digit (8) from the dividend and append it to 160, then repeat: 1608 / 210

Advancing to step 8:
The number 210 fits into 1608 7 times, leaving a remainder of 138.
The number 7 becomes the next digit in our result. 
Result so far: 425017.0
If we take 1470 away from 1608, we end up with 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Advancing to step 9:
210 goes into 1380 6 times with a remainder of 120.
Put 6 as the next digit of the answer. 
Result so far: 425017.6
If we take 1260 away from 1380, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 10:
If we divide 1200 by 210, we get 5 and a remainder of 150.
Record the quotient 5 as the next digit in the result. 
Result so far: 425017.65
The remainder is 150 after subtracting 1050 from 1200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 11:
210 can be fit into 1500 7 times, resulting in a remainder of 30.
Write down 7 as next digit of the result. 
Result so far: 425017.657
Subtract 1470 from 1500 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 12:
210 can be fit into 300 1 times, resulting in a remainder of 90.
Use 1 as the next digit of our solution. 
Result so far: 425017.6571
If we take 210 away from 300, we end up with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Moving on to step 13:
900 divided by 210 is 4 with a remainder of 60.
The next digit of our result is 4. 
Result so far: 425017.65714
Subtract 840 from 900 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 14:
210 can be fit into 600 2 times, resulting in a remainder of 180.
Put 2 as the next digit of the answer. 
Result so far: 425017.657142
Deduct 420 from 600 and we're left with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Advancing to step 15:
The number 210 fits into 1800 8 times, leaving a remainder of 120.
Put 8 as the next digit of the answer. 
Result so far: 425017.6571428
Subtracting 1680 from 1800 leaves us with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

On to step 16:
If we divide 1200 by 210, we get 5 and a remainder of 150.
Use 5 as the next digit of our solution. 
Result so far: 425017.65714285
Deduct 1050 from 1200 and we're left with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

After the division, we end up with 425017.65714285 and a remainder of 1.5e-07.