16503737 divided by 721 
The aim is to understand the frequency of 721 in 16503737.

Step 1:
721 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (6) from the dividend and append it to 1, then repeat: 16 / 721

Let's proceed to step 2:
When dividing 16 by 721, we get 0 with a remainder of 16.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 16 to get 16.
Bring next digit (5) of the dividend behind the 16 and repeat the process: 165 / 721

Step 3:
721 goes into 165 0 times with a remainder of 165.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 165, we get 165.
Fetch the next digit (0) from the dividend, attach it to 165 and continue: 1650 / 721

On to step 4:
When dividing 1650 by 721, we get 2 with a remainder of 208.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 1442 away from 1650, we end up with 208.
Grab the next digit (3) from the dividend, add it to 208, then carry on: 2083 / 721

Going ahead to step 5:
721 goes into 2083 2 times with a remainder of 641.
Write down 2 as next digit of the result. 
Result so far: 22.0
Deduct 1442 from 2083 and we're left with 641.
Include the next digit (7) from the dividend after 641, then repeat: 6417 / 721

Going ahead to step 6:
6417 divided by 721 is 8 with a remainder of 649.
Record the quotient 8 as the next digit in the result. 
Result so far: 228.0
The remainder is 649 after subtracting 5768 from 6417.
Grab the next digit (3) from the dividend, add it to 649, then carry on: 6493 / 721

Moving on to step 7:
721 goes into 6493 9 times with a remainder of 4.
Write down 9 as next digit of the result. 
Result so far: 2289.0
If we subtract 6489 from 6493, we get 4.
Fetch the next digit (7) from the dividend, attach it to 4 and continue: 47 / 721

On to step 8:
721 goes into 47 0 times with a remainder of 47.
Record the quotient 0 as the next digit in the result. 
Result so far: 22890.0
If we subtract 0 from 47, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Moving on to step 9:
When dividing 470 by 721, we get 0 with a remainder of 470.
Write down 0 as next digit of the result. 
Result so far: 22890.0
Subtracting 0 from 470 leaves us with 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

Moving on to step 10:
721 can be fit into 4700 6 times, resulting in a remainder of 374.
Record the quotient 6 as the next digit in the result. 
Result so far: 22890.06
If we subtract 4326 from 4700, we get 374.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3740, and continue the process.

Step 11:
When dividing 3740 by 721, we get 5 with a remainder of 135.
Record the quotient 5 as the next digit in the result. 
Result so far: 22890.065
Deduct 3605 from 3740 and we're left with 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

Advancing to step 12:
When dividing 1350 by 721, we get 1 with a remainder of 629.
The next digit of our result is 1. 
Result so far: 22890.0651
The remainder is 629 after subtracting 721 from 1350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6290, and continue the process.

On to step 13:
If we divide 6290 by 721, we get 8 and a remainder of 522.
Use 8 as the next digit of our solution. 
Result so far: 22890.06518
Subtract 5768 from 6290 to get 522.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5220, and continue the process.

On to step 14:
If we divide 5220 by 721, we get 7 and a remainder of 173.
The number 7 becomes the next digit in our result. 
Result so far: 22890.065187
Subtracting 5047 from 5220 leaves us with 173.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1730, and continue the process.

Moving on to step 15:
When dividing 1730 by 721, we get 2 with a remainder of 288.
Use 2 as the next digit of our solution. 
Result so far: 22890.0651872
Deduct 1442 from 1730 and we're left with 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Step 16:
721 can be fit into 2880 3 times, resulting in a remainder of 717.
Record the quotient 3 as the next digit in the result. 
Result so far: 22890.06518723
Subtract 2163 from 2880 to get 717.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7170, and continue the process.

The final result is 22890.06518723 with a remainder of 7.17e-07.