We look at the division of 64409014 by 425 
The aim is to understand the frequency of 425 in 64409014.

Step 1:
When dividing 6 by 425, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 425

Let's proceed to step 2:
If we divide 64 by 425, we get 0 and a remainder of 64.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 64, we get 64.
Bring next digit (4) of the dividend behind the 64 and repeat the process: 644 / 425

Step 3:
644 divided by 425 is 1 with a remainder of 219.
The next digit of our result is 1. 
Result so far: 1.0
If we take 425 away from 644, we end up with 219.
Grab the next digit (0) from the dividend, add it to 219, then carry on: 2190 / 425

Moving on to step 4:
The number 425 fits into 2190 5 times, leaving a remainder of 65.
Put 5 as the next digit of the answer. 
Result so far: 15.0
If we subtract 2125 from 2190, we get 65.
Include the next digit (9) from the dividend after 65, then repeat: 659 / 425

Moving on to step 5:
The number 425 fits into 659 1 times, leaving a remainder of 234.
Put 1 as the next digit of the answer. 
Result so far: 151.0
Subtracting 425 from 659 leaves us with 234.
Bring next digit (0) of the dividend behind the 234 and repeat the process: 2340 / 425

Moving on to step 6:
425 can be fit into 2340 5 times, resulting in a remainder of 215.
The number 5 becomes the next digit in our result. 
Result so far: 1515.0
Subtracting 2125 from 2340 leaves us with 215.
Grab the next digit (1) from the dividend, add it to 215, then carry on: 2151 / 425

Going ahead to step 7:
2151 divided by 425 is 5 with a remainder of 26.
The number 5 becomes the next digit in our result. 
Result so far: 15155.0
Subtracting 2125 from 2151 leaves us with 26.
Grab the next digit (4) from the dividend, add it to 26, then carry on: 264 / 425

Advancing to step 8:
If we divide 264 by 425, we get 0 and a remainder of 264.
The next digit of our result is 0. 
Result so far: 151550.0
Deduct 0 from 264 and we're left with 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Let's proceed to step 9:
425 goes into 2640 6 times with a remainder of 90.
Use 6 as the next digit of our solution. 
Result so far: 151550.6
If we take 2550 away from 2640, we end up with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Going ahead to step 10:
900 divided by 425 is 2 with a remainder of 50.
Record the quotient 2 as the next digit in the result. 
Result so far: 151550.62
The remainder is 50 after subtracting 850 from 900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 11:
The number 425 fits into 500 1 times, leaving a remainder of 75.
The number 1 becomes the next digit in our result. 
Result so far: 151550.621
If we take 425 away from 500, we end up with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Step 12:
425 goes into 750 1 times with a remainder of 325.
Use 1 as the next digit of our solution. 
Result so far: 151550.6211
If we take 425 away from 750, we end up with 325.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

After the division, we end up with 151550.6211 and a remainder of 0.00325.