We look at the division of 73737872 by 864 
The aim is to understand the frequency of 864 in 73737872.

Advancing to step 1:
The number 864 fits into 7 0 times, leaving a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (3) from the dividend to 7 and continue with: 73 / 864

Step 2:
The number 864 fits into 73 0 times, leaving a remainder of 73.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 73 leaves us with 73.
Fetch the next digit (7) from the dividend, attach it to 73 and continue: 737 / 864

Moving on to step 3:
If we divide 737 by 864, we get 0 and a remainder of 737.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 737, we end up with 737.
Fetch the next digit (3) from the dividend, attach it to 737 and continue: 7373 / 864

On to step 4:
7373 divided by 864 is 8 with a remainder of 461.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtract 6912 from 7373 to get 461.
Take the next digit (7) from the dividend and append it to 461, then repeat: 4617 / 864

Advancing to step 5:
864 can be fit into 4617 5 times, resulting in a remainder of 297.
The next digit of our result is 5. 
Result so far: 85.0
Subtracting 4320 from 4617 leaves us with 297.
Grab the next digit (8) from the dividend, add it to 297, then carry on: 2978 / 864

Moving on to step 6:
864 goes into 2978 3 times with a remainder of 386.
Record the quotient 3 as the next digit in the result. 
Result so far: 853.0
The remainder is 386 after subtracting 2592 from 2978.
Bring next digit (7) of the dividend behind the 386 and repeat the process: 3867 / 864

Step 7:
The number 864 fits into 3867 4 times, leaving a remainder of 411.
Put 4 as the next digit of the answer. 
Result so far: 8534.0
Subtract 3456 from 3867 to get 411.
Take the next digit (2) from the dividend and append it to 411, then repeat: 4112 / 864

Let's proceed to step 8:
4112 divided by 864 is 4 with a remainder of 656.
The number 4 becomes the next digit in our result. 
Result so far: 85344.0
Subtracting 3456 from 4112 leaves us with 656.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6560, and continue the process.

Step 9:
6560 divided by 864 is 7 with a remainder of 512.
Record the quotient 7 as the next digit in the result. 
Result so far: 85344.7
The remainder is 512 after subtracting 6048 from 6560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

Moving on to step 10:
If we divide 5120 by 864, we get 5 and a remainder of 800.
Record the quotient 5 as the next digit in the result. 
Result so far: 85344.75
Subtract 4320 from 5120 to get 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8000, and continue the process.

On to step 11:
8000 divided by 864 is 9 with a remainder of 224.
Record the quotient 9 as the next digit in the result. 
Result so far: 85344.759
If we subtract 7776 from 8000, we get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Let's proceed to step 12:
If we divide 2240 by 864, we get 2 and a remainder of 512.
Use 2 as the next digit of our solution. 
Result so far: 85344.7592
Deduct 1728 from 2240 and we're left with 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

Going ahead to step 13:
5120 divided by 864 is 5 with a remainder of 800.
Write down 5 as next digit of the result. 
Result so far: 85344.75925
If we subtract 4320 from 5120, we get 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8000, and continue the process.

Advancing to step 14:
If we divide 8000 by 864, we get 9 and a remainder of 224.
The next digit of our result is 9. 
Result so far: 85344.759259
If we subtract 7776 from 8000, we get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Advancing to step 15:
864 goes into 2240 2 times with a remainder of 512.
The next digit of our result is 2. 
Result so far: 85344.7592592
If we take 1728 away from 2240, we end up with 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

On to step 16:
When dividing 5120 by 864, we get 5 with a remainder of 800.
The number 5 becomes the next digit in our result. 
Result so far: 85344.75925925
Deduct 4320 from 5120 and we're left with 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8000, and continue the process.

The quotient of the division is 85344.75925925, and the remainder is 8e-07.