640838 ÷ 52 
The aim is to understand the frequency of 52 in 640838.

Step 1:
When dividing 6 by 52, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 52

Step 2:
When dividing 64 by 52, we get 1 with a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 52 from 64 and we're left with 12.
Fetch the next digit (0) from the dividend, attach it to 12 and continue: 120 / 52

On to step 3:
If we divide 120 by 52, we get 2 and a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Deduct 104 from 120 and we're left with 16.
Include the next digit (8) from the dividend after 16, then repeat: 168 / 52

On to step 4:
52 goes into 168 3 times with a remainder of 12.
Record the quotient 3 as the next digit in the result. 
Result so far: 123.0
If we subtract 156 from 168, we get 12.
Fetch the next digit (3) from the dividend, attach it to 12 and continue: 123 / 52

Step 5:
When dividing 123 by 52, we get 2 with a remainder of 19.
Write down 2 as next digit of the result. 
Result so far: 1232.0
Subtract 104 from 123 to get 19.
Take the next digit (8) from the dividend and append it to 19, then repeat: 198 / 52

Let's proceed to step 6:
52 can be fit into 198 3 times, resulting in a remainder of 42.
Record the quotient 3 as the next digit in the result. 
Result so far: 12323.0
If we subtract 156 from 198, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 7:
The number 52 fits into 420 8 times, leaving a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 12323.8
If we subtract 416 from 420, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 8:
When dividing 40 by 52, we get 0 with a remainder of 40.
The next digit of our result is 0. 
Result so far: 12323.8
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 9:
If we divide 400 by 52, we get 7 and a remainder of 36.
Record the quotient 7 as the next digit in the result. 
Result so far: 12323.807
Deduct 364 from 400 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 10:
When dividing 360 by 52, we get 6 with a remainder of 48.
The number 6 becomes the next digit in our result. 
Result so far: 12323.8076
Subtracting 312 from 360 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 11:
480 divided by 52 is 9 with a remainder of 12.
Record the quotient 9 as the next digit in the result. 
Result so far: 12323.80769
Subtract 468 from 480 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 12:
The number 52 fits into 120 2 times, leaving a remainder of 16.
Put 2 as the next digit of the answer. 
Result so far: 12323.807692
If we subtract 104 from 120, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 13:
When dividing 160 by 52, we get 3 with a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 12323.8076923
Subtract 156 from 160 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 14:
52 can be fit into 40 0 times, resulting in a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 12323.8076923
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The final outcome is 12323.8076923, with a leftover of 4e-08.