We're dividing 53395421 by 805 
The aim is to understand the frequency of 805 in 53395421.

Moving on to step 1:
5 divided by 805 is 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 805

Advancing to step 2:
If we divide 53 by 805, we get 0 and a remainder of 53.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 53, we get 53.
Append the next digit (3) from the dividend to 53 and continue with: 533 / 805

Advancing to step 3:
533 divided by 805 is 0 with a remainder of 533.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 533, we get 533.
Include the next digit (9) from the dividend after 533, then repeat: 5339 / 805

Step 4:
The number 805 fits into 5339 6 times, leaving a remainder of 509.
The next digit of our result is 6. 
Result so far: 6.0
If we subtract 4830 from 5339, we get 509.
Grab the next digit (5) from the dividend, add it to 509, then carry on: 5095 / 805

Advancing to step 5:
5095 divided by 805 is 6 with a remainder of 265.
Use 6 as the next digit of our solution. 
Result so far: 66.0
If we subtract 4830 from 5095, we get 265.
Bring next digit (4) of the dividend behind the 265 and repeat the process: 2654 / 805

Advancing to step 6:
2654 divided by 805 is 3 with a remainder of 239.
Record the quotient 3 as the next digit in the result. 
Result so far: 663.0
Subtracting 2415 from 2654 leaves us with 239.
Bring next digit (2) of the dividend behind the 239 and repeat the process: 2392 / 805

Advancing to step 7:
805 goes into 2392 2 times with a remainder of 782.
Put 2 as the next digit of the answer. 
Result so far: 6632.0
If we take 1610 away from 2392, we end up with 782.
Grab the next digit (1) from the dividend, add it to 782, then carry on: 7821 / 805

Going ahead to step 8:
805 goes into 7821 9 times with a remainder of 576.
The number 9 becomes the next digit in our result. 
Result so far: 66329.0
Subtract 7245 from 7821 to get 576.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5760, and continue the process.

Let's proceed to step 9:
The number 805 fits into 5760 7 times, leaving a remainder of 125.
The number 7 becomes the next digit in our result. 
Result so far: 66329.7
The remainder is 125 after subtracting 5635 from 5760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Step 10:
When dividing 1250 by 805, we get 1 with a remainder of 445.
Record the quotient 1 as the next digit in the result. 
Result so far: 66329.71
If we take 805 away from 1250, we end up with 445.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4450, and continue the process.

Let's proceed to step 11:
805 goes into 4450 5 times with a remainder of 425.
Record the quotient 5 as the next digit in the result. 
Result so far: 66329.715
Subtract 4025 from 4450 to get 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

Going ahead to step 12:
805 can be fit into 4250 5 times, resulting in a remainder of 225.
The number 5 becomes the next digit in our result. 
Result so far: 66329.7155
If we subtract 4025 from 4250, we get 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

The final result is 66329.7155 with a remainder of 0.00225.