66775420 ÷ 526 
The aim is to understand the frequency of 526 in 66775420.

Let's proceed to step 1:
6 divided by 526 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 526

Moving on to step 2:
When dividing 66 by 526, we get 0 with a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Fetch the next digit (7) from the dividend, attach it to 66 and continue: 667 / 526

Moving on to step 3:
The number 526 fits into 667 1 times, leaving a remainder of 141.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 526 from 667, we get 141.
Bring next digit (7) of the dividend behind the 141 and repeat the process: 1417 / 526

On to step 4:
526 goes into 1417 2 times with a remainder of 365.
Write down 2 as next digit of the result. 
Result so far: 12.0
Subtract 1052 from 1417 to get 365.
Grab the next digit (5) from the dividend, add it to 365, then carry on: 3655 / 526

Step 5:
526 goes into 3655 6 times with a remainder of 499.
Use 6 as the next digit of our solution. 
Result so far: 126.0
Subtract 3156 from 3655 to get 499.
Bring next digit (4) of the dividend behind the 499 and repeat the process: 4994 / 526

Let's proceed to step 6:
526 goes into 4994 9 times with a remainder of 260.
The next digit of our result is 9. 
Result so far: 1269.0
Subtract 4734 from 4994 to get 260.
Bring next digit (2) of the dividend behind the 260 and repeat the process: 2602 / 526

On to step 7:
526 can be fit into 2602 4 times, resulting in a remainder of 498.
Put 4 as the next digit of the answer. 
Result so far: 12694.0
Subtract 2104 from 2602 to get 498.
Include the next digit (0) from the dividend after 498, then repeat: 4980 / 526

Advancing to step 8:
526 goes into 4980 9 times with a remainder of 246.
Record the quotient 9 as the next digit in the result. 
Result so far: 126949.0
Deduct 4734 from 4980 and we're left with 246.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

Going ahead to step 9:
If we divide 2460 by 526, we get 4 and a remainder of 356.
Use 4 as the next digit of our solution. 
Result so far: 126949.4
Subtracting 2104 from 2460 leaves us with 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

On to step 10:
The number 526 fits into 3560 6 times, leaving a remainder of 404.
The next digit of our result is 6. 
Result so far: 126949.46
Deduct 3156 from 3560 and we're left with 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

On to step 11:
526 can be fit into 4040 7 times, resulting in a remainder of 358.
Use 7 as the next digit of our solution. 
Result so far: 126949.467
If we take 3682 away from 4040, we end up with 358.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3580, and continue the process.

Moving on to step 12:
The number 526 fits into 3580 6 times, leaving a remainder of 424.
Use 6 as the next digit of our solution. 
Result so far: 126949.4676
If we subtract 3156 from 3580, we get 424.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

Let's proceed to step 13:
The number 526 fits into 4240 8 times, leaving a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 126949.46768
Subtracting 4208 from 4240 leaves us 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.

Let's proceed to step 14:
526 can be fit into 320 0 times, resulting in a remainder of 320.
The next digit of our result is 0. 
Result so far: 126949.46768
The remainder is 320 after subtracting 0 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Let's proceed to step 15:
526 goes into 3200 6 times with a remainder of 44.
Write down 6 as next digit of the result. 
Result so far: 126949.4676806
The remainder is 44 after subtracting 3156 from 3200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

On to step 16:
526 can be fit into 440 0 times, resulting in a remainder of 440.
Record the quotient 0 as the next digit in the result. 
Result so far: 126949.4676806
The remainder is 440 after subtracting 0 from 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

After the division, we end up with 126949.4676806 and a remainder of 4.4e-07.