16378369 divided by 9 
The aim is to understand the frequency of 9 in 16378369.

Let's proceed to step 1:
The number 9 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 9

Moving on to step 2:
If we divide 16 by 9, we get 1 and a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 9 from 16 to get 7.
Append the next digit (3) from the dividend to 7 and continue with: 73 / 9

Advancing to step 3:
If we divide 73 by 9, we get 8 and a remainder of 1.
Put 8 as the next digit of the answer. 
Result so far: 18.0
Subtract 72 from 73 to get 1.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 9

Going ahead to step 4:
9 goes into 17 1 times with a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 181.0
If we take 9 away from 17, we end up with 8.
Take the next digit (8) from the dividend and append it to 8, then repeat: 88 / 9

Step 5:
The number 9 fits into 88 9 times, leaving a remainder of 7.
Use 9 as the next digit of our solution. 
Result so far: 1819.0
If we subtract 81 from 88, we get 7.
Append the next digit (3) from the dividend to 7 and continue with: 73 / 9

On to step 6:
The number 9 fits into 73 8 times, leaving a remainder of 1.
Put 8 as the next digit of the answer. 
Result so far: 18198.0
Deduct 72 from 73 and we're left with 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 9

Going ahead to step 7:
16 divided by 9 is 1 with a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 181981.0
If we take 9 away from 16, we end up with 7.
Take the next digit (9) from the dividend and append it to 7, then repeat: 79 / 9

Going ahead to step 8:
9 goes into 79 8 times with a remainder of 7.
The next digit of our result is 8. 
Result so far: 1819818.0
Subtracting 72 from 79 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 9:
When dividing 70 by 9, we get 7 with a remainder of 7.
The next digit of our result is 7. 
Result so far: 1819818.7
Subtracting 63 from 70 leaves us with 7.
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 10:
If we divide 70 by 9, we get 7 and a remainder of 7.
The next digit of our result is 7. 
Result so far: 1819818.77
Deduct 63 from 70 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

After the division, we end up with 1819818.77 and a remainder of 0.007.