We're dividing 85521 by 73 
The aim is to understand the frequency of 73 in 85521.

Going ahead to step 1:
73 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Fetch the next digit (5) from the dividend, attach it to 8 and continue: 85 / 73

Step 2:
73 can be fit into 85 1 times, resulting in a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 73 away from 85, we end up with 12.
Take the next digit (5) from the dividend and append it to 12, then repeat: 125 / 73

Going ahead to step 3:
When dividing 125 by 73, we get 1 with a remainder of 52.
The next digit of our result is 1. 
Result so far: 11.0
The remainder is 52 after subtracting 73 from 125.
Fetch the next digit (2) from the dividend, attach it to 52 and continue: 522 / 73

Going ahead to step 4:
If we divide 522 by 73, we get 7 and a remainder of 11.
Record the quotient 7 as the next digit in the result. 
Result so far: 117.0
If we subtract 511 from 522, we get 11.
Include the next digit (1) from the dividend after 11, then repeat: 111 / 73

Let's proceed to step 5:
The number 73 fits into 111 1 times, leaving a remainder of 38.
Put 1 as the next digit of the answer. 
Result so far: 1171.0
Deduct 73 from 111 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 6:
The number 73 fits into 380 5 times, leaving a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 1171.5
Deduct 365 from 380 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 7:
73 goes into 150 2 times with a remainder of 4.
The next digit of our result is 2. 
Result so far: 1171.52
Subtracting 146 from 150 leaves us with 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 8:
73 goes into 40 0 times with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 1171.52
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.

Moving on to step 9:
The number 73 fits into 400 5 times, leaving a remainder of 35.
The number 5 becomes the next digit in our result. 
Result so far: 1171.5205
If we take 365 away from 400, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 10:
73 goes into 350 4 times with a remainder of 58.
Use 4 as the next digit of our solution. 
Result so far: 1171.52054
If we subtract 292 from 350, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 11:
73 can be fit into 580 7 times, resulting in a remainder of 69.
The number 7 becomes the next digit in our result. 
Result so far: 1171.520547
Deduct 511 from 580 and we're left with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Going ahead to step 12:
When dividing 690 by 73, we get 9 with a remainder of 33.
Write down 9 as next digit of the result. 
Result so far: 1171.5205479
Subtract 657 from 690 to get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 13:
73 can be fit into 330 4 times, resulting in a remainder of 38.
Use 4 as the next digit of our solution. 
Result so far: 1171.52054794
Deduct 292 from 330 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

The final result is 1171.52054794 with a remainder of 3.8e-08.