Let's divide 18991642 by 721
The aim is to understand the frequency of 721 in 18991642.

Advancing to step 1:
When dividing 1 by 721, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 721

Moving on to step 2:
721 goes into 18 0 times with a remainder of 18.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 18 after subtracting 0 from 18.
Append the next digit (9) from the dividend to 18 and continue with: 189 / 721

Moving on to step 3:
If we divide 189 by 721, we get 0 and a remainder of 189.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 189 after subtracting 0 from 189.
Append the next digit (9) from the dividend to 189 and continue with: 1899 / 721

Advancing to step 4:
When dividing 1899 by 721, we get 2 with a remainder of 457.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 1442 away from 1899, we end up with 457.
Bring next digit (1) of the dividend behind the 457 and repeat the process: 4571 / 721

Let's proceed to step 5:
The number 721 fits into 4571 6 times, leaving a remainder of 245.
The number 6 becomes the next digit in our result. 
Result so far: 26.0
Deduct 4326 from 4571 and we're left with 245.
Append the next digit (6) from the dividend to 245 and continue with: 2456 / 721

Moving on to step 6:
If we divide 2456 by 721, we get 3 and a remainder of 293.
Write down 3 as next digit of the result. 
Result so far: 263.0
If we take 2163 away from 2456, we end up with 293.
Bring next digit (4) of the dividend behind the 293 and repeat the process: 2934 / 721

Going ahead to step 7:
721 can be fit into 2934 4 times, resulting in a remainder of 50.
The next digit of our result is 4. 
Result so far: 2634.0
The remainder is 50 after subtracting 2884 from 2934.
Take the next digit (2) from the dividend and append it to 50, then repeat: 502 / 721

Going ahead to step 8:
The number 721 fits into 502 0 times, leaving a remainder of 502.
Use 0 as the next digit of our solution. 
Result so far: 26340.0
The remainder is 502 after subtracting 0 from 502.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5020, and continue the process.

On to step 9:
5020 divided by 721 is 6 with a remainder of 694.
Put 6 as the next digit of the answer. 
Result so far: 26340.6
If we subtract 4326 from 5020, we get 694.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6940, and continue the process.

Moving on to step 10:
When dividing 6940 by 721, we get 9 with a remainder of 451.
The number 9 becomes the next digit in our result. 
Result so far: 26340.69
If we take 6489 away from 6940, we end up with 451.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4510, and continue the process.

Advancing to step 11:
4510 divided by 721 is 6 with a remainder of 184.
Put 6 as the next digit of the answer. 
Result so far: 26340.696
Subtract 4326 from 4510 to get 184.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

Going ahead to step 12:
1840 divided by 721 is 2 with a remainder of 398.
Record the quotient 2 as the next digit in the result. 
Result so far: 26340.6962
The remainder is 398 after subtracting 1442 from 1840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

Let's proceed to step 13:
When dividing 3980 by 721, we get 5 with a remainder of 375.
Record the quotient 5 as the next digit in the result. 
Result so far: 26340.69625
Subtracting 3605 from 3980 leaves us with 375.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3750, and continue the process.

Advancing to step 14:
The number 721 fits into 3750 5 times, leaving a remainder of 145.
The next digit of our result is 5. 
Result so far: 26340.696255
If we subtract 3605 from 3750, we get 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

The quotient of the division is 26340.696255, and the remainder is 1.45e-05.