428615 ÷ 64 
The aim is to understand the frequency of 64 in 428615.

Moving on to step 1:
When dividing 4 by 64, we get 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 64

On to step 2:
42 divided by 64 is 0 with a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Take the next digit (8) from the dividend and append it to 42, then repeat: 428 / 64

On to step 3:
The number 64 fits into 428 6 times, leaving a remainder of 44.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Subtract 384 from 428 to get 44.
Grab the next digit (6) from the dividend, add it to 44, then carry on: 446 / 64

Going ahead to step 4:
When dividing 446 by 64, we get 6 with a remainder of 62.
Use 6 as the next digit of our solution. 
Result so far: 66.0
Subtract 384 from 446 to get 62.
Bring next digit (1) of the dividend behind the 62 and repeat the process: 621 / 64

Let's proceed to step 5:
621 divided by 64 is 9 with a remainder of 45.
Record the quotient 9 as the next digit in the result. 
Result so far: 669.0
Deduct 576 from 621 and we're left with 45.
Take the next digit (5) from the dividend and append it to 45, then repeat: 455 / 64

Let's proceed to step 6:
64 can be fit into 455 7 times, resulting in a remainder of 7.
Use 7 as the next digit of our solution. 
Result so far: 6697.0
Subtracting 448 from 455 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.

Going ahead to step 7:
When dividing 70 by 64, we get 1 with a remainder of 6.
Write down 1 as next digit of the result. 
Result so far: 6697.1
Subtract 64 from 70 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 8:
The number 64 fits into 60 0 times, leaving a remainder of 60.
The next digit of our result is 0. 
Result so far: 6697.1
The remainder is 60 after subtracting 0 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 9:
The number 64 fits into 600 9 times, leaving a remainder of 24.
The next digit of our result is 9. 
Result so far: 6697.109
The remainder is 24 after subtracting 576 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 10:
64 goes into 240 3 times with a remainder of 48.
Put 3 as the next digit of the answer. 
Result so far: 6697.1093
If we take 192 away from 240, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 11:
If we divide 480 by 64, we get 7 and a remainder of 32.
Write down 7 as next digit of the result. 
Result so far: 6697.10937
Deduct 448 from 480 and we're left 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.

Moving on to step 12:
If we divide 320 by 64, we get 5 and a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 6697.109375
If we subtract 320 from 320, we 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.

On to step 13:
The number 64 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 6697.109375
If we subtract 0 from 0, we 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:
If we divide 0 by 64, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 6697.109375
The remainder is 0 after subtracting 0 from 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 6697.109375, with a leftover of 0.0.