We're dividing 431621 by 64 
The aim is to understand the frequency of 64 in 431621.

Let's proceed to step 1:
64 can be fit into 4 0 times, resulting in a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 64

Let's proceed to step 2:
64 can be fit into 43 0 times, resulting in a remainder of 43.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 43 after subtracting 0 from 43.
Append the next digit (1) from the dividend to 43 and continue with: 431 / 64

Advancing to step 3:
431 divided by 64 is 6 with a remainder of 47.
The next digit of our result is 6. 
Result so far: 6.0
Deduct 384 from 431 and we're left with 47.
Bring next digit (6) of the dividend behind the 47 and repeat the process: 476 / 64

Advancing to step 4:
476 divided by 64 is 7 with a remainder of 28.
Use 7 as the next digit of our solution. 
Result so far: 67.0
Subtracting 448 from 476 leaves us with 28.
Grab the next digit (2) from the dividend, add it to 28, then carry on: 282 / 64

Let's proceed to step 5:
282 divided by 64 is 4 with a remainder of 26.
Write down 4 as next digit of the result. 
Result so far: 674.0
Subtracting 256 from 282 leaves us with 26.
Take the next digit (1) from the dividend and append it to 26, then repeat: 261 / 64

Let's proceed to step 6:
261 divided by 64 is 4 with a remainder of 5.
Record the quotient 4 as the next digit in the result. 
Result so far: 6744.0
Deduct 256 from 261 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 7:
The number 64 fits into 50 0 times, leaving a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 6744.0
If we subtract 0 from 50, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 8:
The number 64 fits into 500 7 times, leaving a remainder of 52.
Put 7 as the next digit of the answer. 
Result so far: 6744.07
The remainder is 52 after subtracting 448 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Let's proceed to step 9:
If we divide 520 by 64, we get 8 and a remainder of 8.
Use 8 as the next digit of our solution. 
Result so far: 6744.078
Deduct 512 from 520 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 10:
64 goes into 80 1 times with a remainder of 16.
The number 1 becomes the next digit in our result. 
Result so far: 6744.0781
The remainder is 16 after subtracting 64 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 11:
If we divide 160 by 64, we get 2 and a remainder of 32.
The next digit of our result is 2. 
Result so far: 6744.07812
The remainder is 32 after subtracting 128 from 160.
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:
64 goes into 320 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 6744.078125
Subtract 320 from 320 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.

On to step 13:
0 divided by 64 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 6744.078125
Subtracting 0 from 0 leaves us 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 14:
0 divided by 64 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 6744.078125
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.

The quotient of the division is 6744.078125, and the remainder is 0.0.