71297425 divided by 664 
The aim is to understand the frequency of 664 in 71297425.

On to step 1:
If we divide 7 by 664, we get 0 and a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Fetch the next digit (1) from the dividend, attach it to 7 and continue: 71 / 664

On to step 2:
664 can be fit into 71 0 times, resulting in a remainder of 71.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 71 after subtracting 0 from 71.
Fetch the next digit (2) from the dividend, attach it to 71 and continue: 712 / 664

Let's proceed to step 3:
If we divide 712 by 664, we get 1 and a remainder of 48.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 664 from 712, we get 48.
Fetch the next digit (9) from the dividend, attach it to 48 and continue: 489 / 664

Moving on to step 4:
664 goes into 489 0 times with a remainder of 489.
The next digit of our result is 0. 
Result so far: 10.0
If we take 0 away from 489, we end up with 489.
Grab the next digit (7) from the dividend, add it to 489, then carry on: 4897 / 664

Let's proceed to step 5:
664 can be fit into 4897 7 times, resulting in a remainder of 249.
Write down 7 as next digit of the result. 
Result so far: 107.0
Subtract 4648 from 4897 to get 249.
Grab the next digit (4) from the dividend, add it to 249, then carry on: 2494 / 664

Let's proceed to step 6:
The number 664 fits into 2494 3 times, leaving a remainder of 502.
Write down 3 as next digit of the result. 
Result so far: 1073.0
If we take 1992 away from 2494, we end up with 502.
Fetch the next digit (2) from the dividend, attach it to 502 and continue: 5022 / 664

Going ahead to step 7:
The number 664 fits into 5022 7 times, leaving a remainder of 374.
Write down 7 as next digit of the result. 
Result so far: 10737.0
The remainder is 374 after subtracting 4648 from 5022.
Include the next digit (5) from the dividend after 374, then repeat: 3745 / 664

Moving on to step 8:
When dividing 3745 by 664, we get 5 with a remainder of 425.
Record the quotient 5 as the next digit in the result. 
Result so far: 107375.0
Subtract 3320 from 3745 to get 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

Let's proceed to step 9:
The number 664 fits into 4250 6 times, leaving a remainder of 266.
Put 6 as the next digit of the answer. 
Result so far: 107375.6
If we take 3984 away from 4250, we end up with 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Moving on to step 10:
When dividing 2660 by 664, we get 4 with a remainder of 4.
Write down 4 as next digit of the result. 
Result so far: 107375.64
The remainder is 4 after subtracting 2656 from 2660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 11:
When dividing 40 by 664, we get 0 with a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 107375.64
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 12:
If we divide 400 by 664, we get 0 and a remainder of 400.
Put 0 as the next digit of the answer. 
Result so far: 107375.64
The remainder is 400 after subtracting 0 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The final outcome is 107375.64, with a leftover of 0.004.