We're dividing 16389966 by 731 
The aim is to understand the frequency of 731 in 16389966.

Going ahead to step 1:
731 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 731

Going ahead to step 2:
731 goes into 16 0 times with a remainder of 16.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 16, we end up with 16.
Include the next digit (3) from the dividend after 16, then repeat: 163 / 731

Advancing to step 3:
When dividing 163 by 731, we get 0 with a remainder of 163.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 163 leaves us with 163.
Grab the next digit (8) from the dividend, add it to 163, then carry on: 1638 / 731

Going ahead to step 4:
The number 731 fits into 1638 2 times, leaving a remainder of 176.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 176 after subtracting 1462 from 1638.
Append the next digit (9) from the dividend to 176 and continue with: 1769 / 731

Going ahead to step 5:
If we divide 1769 by 731, we get 2 and a remainder of 307.
Use 2 as the next digit of our solution. 
Result so far: 22.0
The remainder is 307 after subtracting 1462 from 1769.
Bring next digit (9) of the dividend behind the 307 and repeat the process: 3079 / 731

Step 6:
The number 731 fits into 3079 4 times, leaving a remainder of 155.
Record the quotient 4 as the next digit in the result. 
Result so far: 224.0
The remainder is 155 after subtracting 2924 from 3079.
Bring next digit (6) of the dividend behind the 155 and repeat the process: 1556 / 731

Moving on to step 7:
When dividing 1556 by 731, we get 2 with a remainder of 94.
Put 2 as the next digit of the answer. 
Result so far: 2242.0
Subtract 1462 from 1556 to get 94.
Bring next digit (6) of the dividend behind the 94 and repeat the process: 946 / 731

Moving on to step 8:
946 divided by 731 is 1 with a remainder of 215.
The number 1 becomes the next digit in our result. 
Result so far: 22421.0
The remainder is 215 after subtracting 731 from 946.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Going ahead to step 9:
731 can be fit into 2150 2 times, resulting in a remainder of 688.
Use 2 as the next digit of our solution. 
Result so far: 22421.2
If we take 1462 away from 2150, we end up with 688.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6880, and continue the process.

Going ahead to step 10:
731 can be fit into 6880 9 times, resulting in a remainder of 301.
Use 9 as the next digit of our solution. 
Result so far: 22421.29
If we subtract 6579 from 6880, we get 301.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3010, and continue the process.

Step 11:
3010 divided by 731 is 4 with a remainder of 86.
Use 4 as the next digit of our solution. 
Result so far: 22421.294
If we take 2924 away from 3010, we end up with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

On to step 12:
731 goes into 860 1 times with a remainder of 129.
Record the quotient 1 as the next digit in the result. 
Result so far: 22421.2941
If we take 731 away from 860, we end up with 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

Going ahead to step 13:
1290 divided by 731 is 1 with a remainder of 559.
Write down 1 as next digit of the result. 
Result so far: 22421.29411
Deduct 731 from 1290 and we're left with 559.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5590, and continue the process.

After the division, we end up with 22421.29411 and a remainder of 0.000559.