We're dividing 991473 by 64 
The aim is to understand the frequency of 64 in 991473.

Moving on to step 1:
64 goes into 9 0 times with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 64

On to step 2:
If we divide 99 by 64, we get 1 and a remainder of 35.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 64 from 99 to get 35.
Grab the next digit (1) from the dividend, add it to 35, then carry on: 351 / 64

Going ahead to step 3:
64 goes into 351 5 times with a remainder of 31.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
If we subtract 320 from 351, we get 31.
Grab the next digit (4) from the dividend, add it to 31, then carry on: 314 / 64

Moving on to step 4:
When dividing 314 by 64, we get 4 with a remainder of 58.
Use 4 as the next digit of our solution. 
Result so far: 154.0
Subtract 256 from 314 to get 58.
Append the next digit (7) from the dividend to 58 and continue with: 587 / 64

Step 5:
64 goes into 587 9 times with a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 1549.0
Deduct 576 from 587 and we're left with 11.
Append the next digit (3) from the dividend to 11 and continue with: 113 / 64

Advancing to step 6:
When dividing 113 by 64, we get 1 with a remainder of 49.
Use 1 as the next digit of our solution. 
Result so far: 15491.0
If we take 64 away from 113, we end up with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Step 7:
The number 64 fits into 490 7 times, leaving a remainder of 42.
Record the quotient 7 as the next digit in the result. 
Result so far: 15491.7
If we take 448 away from 490, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 8:
420 divided by 64 is 6 with a remainder of 36.
Use 6 as the next digit of our solution. 
Result so far: 15491.76
If we take 384 away from 420, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 9:
If we divide 360 by 64, we get 5 and a remainder of 40.
Use 5 as the next digit of our solution. 
Result so far: 15491.765
Subtract 320 from 360 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 10:
400 divided by 64 is 6 with a remainder of 16.
Put 6 as the next digit of the answer. 
Result so far: 15491.7656
Subtracting 384 from 400 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 11:
The number 64 fits into 160 2 times, leaving a remainder of 32.
Use 2 as the next digit of our solution. 
Result so far: 15491.76562
If we take 128 away from 160, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 12:
If we divide 320 by 64, we get 5 and a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 15491.765625
Deduct 320 from 320 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 13:
0 divided by 64 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 15491.765625
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 14:
The number 64 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 15491.765625
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 15491.765625, with a leftover of 0.0.