4518419 divided by 210 
The aim is to understand the frequency of 210 in 4518419.

Step 1:
The number 210 fits into 4 0 times, leaving a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Include the next digit (5) from the dividend after 4, then repeat: 45 / 210

Going ahead to step 2:
If we divide 45 by 210, we get 0 and a remainder of 45.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 45, we end up with 45.
Fetch the next digit (1) from the dividend, attach it to 45 and continue: 451 / 210

Going ahead to step 3:
When dividing 451 by 210, we get 2 with a remainder of 31.
The next digit of our result is 2. 
Result so far: 2.0
If we take 420 away from 451, we end up with 31.
Take the next digit (8) from the dividend and append it to 31, then repeat: 318 / 210

Going ahead to step 4:
210 can be fit into 318 1 times, resulting in a remainder of 108.
The number 1 becomes the next digit in our result. 
Result so far: 21.0
Subtracting 210 from 318 leaves us with 108.
Include the next digit (4) from the dividend after 108, then repeat: 1084 / 210

On to step 5:
If we divide 1084 by 210, we get 5 and a remainder of 34.
Put 5 as the next digit of the answer. 
Result so far: 215.0
Deduct 1050 from 1084 and we're left with 34.
Take the next digit (1) from the dividend and append it to 34, then repeat: 341 / 210

Advancing to step 6:
The number 210 fits into 341 1 times, leaving a remainder of 131.
Write down 1 as next digit of the result. 
Result so far: 2151.0
Subtracting 210 from 341 leaves us with 131.
Append the next digit (9) from the dividend to 131 and continue with: 1319 / 210

Going ahead to step 7:
1319 divided by 210 is 6 with a remainder of 59.
Write down 6 as next digit of the result. 
Result so far: 21516.0
Subtract 1260 from 1319 to get 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Going ahead to step 8:
When dividing 590 by 210, we get 2 with a remainder of 170.
The next digit of our result is 2. 
Result so far: 21516.2
The remainder is 170 after subtracting 420 from 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Advancing to step 9:
210 goes into 1700 8 times with a remainder of 20.
Write down 8 as next digit of the result. 
Result so far: 21516.28
Subtracting 1680 from 1700 leaves us 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 10:
When dividing 200 by 210, we get 0 with a remainder of 200.
Write down 0 as next digit of the result. 
Result so far: 21516.28
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 11:
210 can be fit into 2000 9 times, resulting in a remainder of 110.
The number 9 becomes the next digit in our result. 
Result so far: 21516.2809
If we subtract 1890 from 2000, we 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.
Put 5 as the next digit of the answer. 
Result so far: 21516.28095
Subtracting 1050 from 1100 leaves us 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.

Advancing to step 13:
210 goes into 500 2 times with a remainder of 80.
Use 2 as the next digit of our solution. 
Result so far: 21516.280952
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.

On to step 14:
When dividing 800 by 210, we get 3 with a remainder of 170.
Put 3 as the next digit of the answer. 
Result so far: 21516.2809523
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.

Going ahead to step 15:
If we divide 1700 by 210, we get 8 and a remainder of 20.
Put 8 as the next digit of the answer. 
Result so far: 21516.28095238
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.

Our division results in 21516.28095238 with a remaining 2e-08.