525410 divided by 66 
The aim is to understand the frequency of 66 in 525410.

Let's proceed to step 1:
66 can be fit into 5 0 times, resulting in a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Bring next digit (2) of the dividend behind the 5 and repeat the process: 52 / 66

Going ahead to step 2:
52 divided by 66 is 0 with a remainder of 52.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 52 and we're left with 52.
Include the next digit (5) from the dividend after 52, then repeat: 525 / 66

Going ahead to step 3:
The number 66 fits into 525 7 times, leaving a remainder of 63.
The next digit of our result is 7. 
Result so far: 7.0
Subtracting 462 from 525 leaves us with 63.
Grab the next digit (4) from the dividend, add it to 63, then carry on: 634 / 66

Let's proceed to step 4:
When dividing 634 by 66, we get 9 with a remainder of 40.
The next digit of our result is 9. 
Result so far: 79.0
Subtracting 594 from 634 leaves us with 40.
Append the next digit (1) from the dividend to 40 and continue with: 401 / 66

Going ahead to step 5:
66 can be fit into 401 6 times, resulting in a remainder of 5.
The next digit of our result is 6. 
Result so far: 796.0
If we take 396 away from 401, we end up with 5.
Fetch the next digit (0) from the dividend, attach it to 5 and continue: 50 / 66

Advancing to step 6:
The number 66 fits into 50 0 times, leaving a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 7960.0
The remainder is 50 after subtracting 0 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 7:
The number 66 fits into 500 7 times, leaving a remainder of 38.
Use 7 as the next digit of our solution. 
Result so far: 7960.7
If we subtract 462 from 500, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 8:
380 divided by 66 is 5 with a remainder of 50.
The next digit of our result is 5. 
Result so far: 7960.75
Deduct 330 from 380 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 9:
The number 66 fits into 500 7 times, leaving a remainder of 38.
The number 7 becomes the next digit in our result. 
Result so far: 7960.757
Deduct 462 from 500 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 10:
66 goes into 380 5 times with a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 7960.7575
Subtract 330 from 380 to 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.

Going ahead to step 11:
66 can be fit into 500 7 times, resulting in a remainder of 38.
The next digit of our result is 7. 
Result so far: 7960.75757
Subtracting 462 from 500 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 12:
66 can be fit into 380 5 times, resulting in a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 7960.757575
The remainder is 50 after subtracting 330 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 13:
When dividing 500 by 66, we get 7 with a remainder of 38.
Record the quotient 7 as the next digit in the result. 
Result so far: 7960.7575757
The remainder is 38 after subtracting 462 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 14:
When dividing 380 by 66, we get 5 with a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 7960.75757575
Subtract 330 from 380 to 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.

After the division, we end up with 7960.75757575 and a remainder of 5e-08.