501991 ÷ 73 
The aim is to understand the frequency of 73 in 501991.

Moving on to step 1:
When dividing 5 by 73, we get 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Grab the next digit (0) from the dividend, add it to 5, then carry on: 50 / 73

Let's proceed to step 2:
The number 73 fits into 50 0 times, leaving a remainder of 50.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 50 and we're left with 50.
Append the next digit (1) from the dividend to 50 and continue with: 501 / 73

Going ahead to step 3:
When dividing 501 by 73, we get 6 with a remainder of 63.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
The remainder is 63 after subtracting 438 from 501.
Bring next digit (9) of the dividend behind the 63 and repeat the process: 639 / 73

Advancing to step 4:
The number 73 fits into 639 8 times, leaving a remainder of 55.
The number 8 becomes the next digit in our result. 
Result so far: 68.0
Subtract 584 from 639 to get 55.
Bring next digit (9) of the dividend behind the 55 and repeat the process: 559 / 73

Going ahead to step 5:
The number 73 fits into 559 7 times, leaving a remainder of 48.
Use 7 as the next digit of our solution. 
Result so far: 687.0
Deduct 511 from 559 and we're left with 48.
Bring next digit (1) of the dividend behind the 48 and repeat the process: 481 / 73

On to step 6:
The number 73 fits into 481 6 times, leaving a remainder of 43.
Record the quotient 6 as the next digit in the result. 
Result so far: 6876.0
Subtracting 438 from 481 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 7:
The number 73 fits into 430 5 times, leaving a remainder of 65.
Put 5 as the next digit of the answer. 
Result so far: 6876.5
Subtracting 365 from 430 leaves us with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Moving on to step 8:
The number 73 fits into 650 8 times, leaving a remainder of 66.
The number 8 becomes the next digit in our result. 
Result so far: 6876.58
Subtract 584 from 650 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Moving on to step 9:
73 can be fit into 660 9 times, resulting in a remainder of 3.
Write down 9 as next digit of the result. 
Result so far: 6876.589
Subtract 657 from 660 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 10:
The number 73 fits into 30 0 times, leaving a remainder of 30.
The next digit of our result is 0. 
Result so far: 6876.589
If we take 0 away from 30, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 11:
73 can be fit into 300 4 times, resulting in a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 6876.58904
If we take 292 away from 300, 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.

Going ahead to step 12:
73 goes into 80 1 times with a remainder of 7.
The next digit of our result is 1. 
Result so far: 6876.589041
The remainder is 7 after subtracting 73 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 13:
If we divide 70 by 73, we get 0 and a remainder of 70.
Use 0 as the next digit of our solution. 
Result so far: 6876.589041
If we take 0 away from 70, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 14:
When dividing 700 by 73, we get 9 with a remainder of 43.
Use 9 as the next digit of our solution. 
Result so far: 6876.58904109
Deduct 657 from 700 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

In conclusion, the division gives 6876.58904109 with a balance of 4.3e-08.