We look at the division of 51566806 by 73 
The aim is to understand the frequency of 73 in 51566806.

On to step 1:
73 goes into 5 0 times with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 73

Advancing to step 2:
73 can be fit into 51 0 times, resulting in a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Take the next digit (5) from the dividend and append it to 51, then repeat: 515 / 73

On to step 3:
When dividing 515 by 73, we get 7 with a remainder of 4.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtract 511 from 515 to get 4.
Include the next digit (6) from the dividend after 4, then repeat: 46 / 73

Going ahead to step 4:
When dividing 46 by 73, we get 0 with a remainder of 46.
The next digit of our result is 0. 
Result so far: 70.0
Subtract 0 from 46 to get 46.
Grab the next digit (6) from the dividend, add it to 46, then carry on: 466 / 73

Let's proceed to step 5:
73 goes into 466 6 times with a remainder of 28.
Record the quotient 6 as the next digit in the result. 
Result so far: 706.0
Subtract 438 from 466 to get 28.
Take the next digit (8) from the dividend and append it to 28, then repeat: 288 / 73

Let's proceed to step 6:
73 can be fit into 288 3 times, resulting in a remainder of 69.
The number 3 becomes the next digit in our result. 
Result so far: 7063.0
If we subtract 219 from 288, we get 69.
Bring next digit (0) of the dividend behind the 69 and repeat the process: 690 / 73

Step 7:
When dividing 690 by 73, we get 9 with a remainder of 33.
The next digit of our result is 9. 
Result so far: 70639.0
Deduct 657 from 690 and we're left with 33.
Grab the next digit (6) from the dividend, add it to 33, then carry on: 336 / 73

Step 8:
The number 73 fits into 336 4 times, leaving a remainder of 44.
Use 4 as the next digit of our solution. 
Result so far: 706394.0
The remainder is 44 after subtracting 292 from 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 9:
If we divide 440 by 73, we get 6 and a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 706394.6
Deduct 438 from 440 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.

Moving on to step 10:
73 goes into 20 0 times with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 706394.6
If we take 0 away from 20, we end up 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.

Advancing to step 11:
200 divided by 73 is 2 with a remainder of 54.
Write down 2 as next digit of the result. 
Result so far: 706394.602
The remainder is 54 after subtracting 146 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Advancing to step 12:
73 can be fit into 540 7 times, resulting in a remainder of 29.
Use 7 as the next digit of our solution. 
Result so far: 706394.6027
Subtracting 511 from 540 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Advancing to step 13:
290 divided by 73 is 3 with a remainder of 71.
The number 3 becomes the next digit in our result. 
Result so far: 706394.60273
Deduct 219 from 290 and we're left with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Step 14:
73 can be fit into 710 9 times, resulting in a remainder of 53.
Record the quotient 9 as the next digit in the result. 
Result so far: 706394.602739
Deduct 657 from 710 and we're left with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Moving on to step 15:
When dividing 530 by 73, we get 7 with a remainder of 19.
The next digit of our result is 7. 
Result so far: 706394.6027397
Subtracting 511 from 530 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 16:
190 divided by 73 is 2 with a remainder of 44.
The number 2 becomes the next digit in our result. 
Result so far: 706394.60273972
Subtract 146 from 190 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.

Our division results in 706394.60273972 with a remaining 4.4e-08.