66608691 ÷ 107 
The aim is to understand the frequency of 107 in 66608691.

Advancing to step 1:
107 can be fit into 6 0 times, resulting in a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 107

Advancing to step 2:
107 can be fit into 66 0 times, resulting in a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Take the next digit (6) from the dividend and append it to 66, then repeat: 666 / 107

Advancing to step 3:
666 divided by 107 is 6 with a remainder of 24.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Subtracting 642 from 666 leaves us with 24.
Grab the next digit (0) from the dividend, add it to 24, then carry on: 240 / 107

On to step 4:
107 goes into 240 2 times with a remainder of 26.
Put 2 as the next digit of the answer. 
Result so far: 62.0
If we subtract 214 from 240, we get 26.
Bring next digit (8) of the dividend behind the 26 and repeat the process: 268 / 107

Going ahead to step 5:
When dividing 268 by 107, we get 2 with a remainder of 54.
The next digit of our result is 2. 
Result so far: 622.0
If we subtract 214 from 268, we get 54.
Include the next digit (6) from the dividend after 54, then repeat: 546 / 107

Moving on to step 6:
107 can be fit into 546 5 times, resulting in a remainder of 11.
Put 5 as the next digit of the answer. 
Result so far: 6225.0
The remainder is 11 after subtracting 535 from 546.
Include the next digit (9) from the dividend after 11, then repeat: 119 / 107

Step 7:
The number 107 fits into 119 1 times, leaving a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 62251.0
Subtract 107 from 119 to get 12.
Include the next digit (1) from the dividend after 12, then repeat: 121 / 107

On to step 8:
107 can be fit into 121 1 times, resulting in a remainder of 14.
Write down 1 as next digit of the result. 
Result so far: 622511.0
Subtract 107 from 121 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 9:
107 goes into 140 1 times with a remainder of 33.
The number 1 becomes the next digit in our result. 
Result so far: 622511.1
If we subtract 107 from 140, we get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Let's proceed to step 10:
If we divide 330 by 107, we get 3 and a remainder of 9.
Record the quotient 3 as the next digit in the result. 
Result so far: 622511.13
If we take 321 away from 330, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 11:
90 divided by 107 is 0 with a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 622511.13
If we take 0 away from 90, 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.

Let's proceed to step 12:
If we divide 900 by 107, we get 8 and a remainder of 44.
Use 8 as the next digit of our solution. 
Result so far: 622511.1308
Deduct 856 from 900 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 13:
When dividing 440 by 107, we get 4 with a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 622511.13084
Subtract 428 from 440 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 14:
When dividing 120 by 107, we get 1 with a remainder of 13.
Record the quotient 1 as the next digit in the result. 
Result so far: 622511.130841
The remainder is 13 after subtracting 107 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 15:
The number 107 fits into 130 1 times, leaving a remainder of 23.
Put 1 as the next digit of the answer. 
Result so far: 622511.1308411
If we subtract 107 from 130, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

The quotient of the division is 622511.1308411, and the remainder is 2.3e-07.