We're dividing 621870 by 52 
The aim is to understand the frequency of 52 in 621870.

Let's proceed to step 1:
6 divided by 52 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Fetch the next digit (2) from the dividend, attach it to 6 and continue: 62 / 52

Step 2:
52 goes into 62 1 times with a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 52 from 62 and we're left with 10.
Take the next digit (1) from the dividend and append it to 10, then repeat: 101 / 52

Going ahead to step 3:
52 can be fit into 101 1 times, resulting in a remainder of 49.
Write down 1 as next digit of the result. 
Result so far: 11.0
Subtracting 52 from 101 leaves us with 49.
Append the next digit (8) from the dividend to 49 and continue with: 498 / 52

Let's proceed to step 4:
When dividing 498 by 52, we get 9 with a remainder of 30.
Put 9 as the next digit of the answer. 
Result so far: 119.0
Subtract 468 from 498 to get 30.
Include the next digit (7) from the dividend after 30, then repeat: 307 / 52

Advancing to step 5:
When dividing 307 by 52, we get 5 with a remainder of 47.
Record the quotient 5 as the next digit in the result. 
Result so far: 1195.0
If we subtract 260 from 307, we get 47.
Take the next digit (0) from the dividend and append it to 47, then repeat: 470 / 52

On to step 6:
470 divided by 52 is 9 with a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 11959.0
Deduct 468 from 470 and we're left 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.

Going ahead to step 7:
The number 52 fits into 20 0 times, leaving a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 11959.0
Subtracting 0 from 20 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 8:
52 can be fit into 200 3 times, resulting in a remainder of 44.
Record the quotient 3 as the next digit in the result. 
Result so far: 11959.03
If we subtract 156 from 200, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 9:
The number 52 fits into 440 8 times, leaving a remainder of 24.
The number 8 becomes the next digit in our result. 
Result so far: 11959.038
Deduct 416 from 440 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 10:
240 divided by 52 is 4 with a remainder of 32.
Write down 4 as next digit of the result. 
Result so far: 11959.0384
Deduct 208 from 240 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 11:
320 divided by 52 is 6 with a remainder of 8.
The next digit of our result is 6. 
Result so far: 11959.03846
If we take 312 away from 320, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 12:
When dividing 80 by 52, we get 1 with a remainder of 28.
Use 1 as the next digit of our solution. 
Result so far: 11959.038461
The remainder is 28 after subtracting 52 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 13:
52 goes into 280 5 times with a remainder of 20.
Record the quotient 5 as the next digit in the result. 
Result so far: 11959.0384615
Subtracting 260 from 280 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.

Step 14:
52 goes into 200 3 times with a remainder of 44.
Record the quotient 3 as the next digit in the result. 
Result so far: 11959.03846153
Subtract 156 from 200 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The final outcome is 11959.03846153, with a leftover of 4.4e-08.