210505 ÷ 4 
The aim is to understand the frequency of 4 in 210505.

On to step 1:
If we divide 2 by 4, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 4

Step 2:
If we divide 21 by 4, we get 5 and a remainder of 1.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
The remainder is 1 after subtracting 20 from 21.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 4

Step 3:
4 goes into 10 2 times with a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 52.0
Subtracting 8 from 10 leaves us with 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 4

Advancing to step 4:
When dividing 25 by 4, we get 6 with a remainder of 1.
The next digit of our result is 6. 
Result so far: 526.0
If we take 24 away from 25, we end up with 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 4

Step 5:
10 divided by 4 is 2 with a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 5262.0
The remainder is 2 after subtracting 8 from 10.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 4

Moving on to step 6:
4 can be fit into 25 6 times, resulting in a remainder of 1.
The next digit of our result is 6. 
Result so far: 52626.0
If we take 24 away from 25, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 7:
When dividing 10 by 4, we get 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 52626.2
Subtracting 8 from 10 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 8:
4 goes into 20 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 52626.25
If we take 20 away from 20, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
0 divided by 4 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 52626.25
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 10:
4 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 52626.25
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 52626.25, with a leftover of 0.0.