We look at the division of 66176644 by 623 
The aim is to understand the frequency of 623 in 66176644.

Moving on to step 1:
If we divide 6 by 623, we get 0 and a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 623

Moving on to step 2:
The number 623 fits into 66 0 times, leaving a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Fetch the next digit (1) from the dividend, attach it to 66 and continue: 661 / 623

Going ahead to step 3:
623 can be fit into 661 1 times, resulting in a remainder of 38.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 623 from 661 leaves us with 38.
Bring next digit (7) of the dividend behind the 38 and repeat the process: 387 / 623

On to step 4:
623 can be fit into 387 0 times, resulting in a remainder of 387.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we take 0 away from 387, we end up with 387.
Grab the next digit (6) from the dividend, add it to 387, then carry on: 3876 / 623

Step 5:
623 goes into 3876 6 times with a remainder of 138.
Use 6 as the next digit of our solution. 
Result so far: 106.0
Deduct 3738 from 3876 and we're left with 138.
Fetch the next digit (6) from the dividend, attach it to 138 and continue: 1386 / 623

Moving on to step 6:
The number 623 fits into 1386 2 times, leaving a remainder of 140.
The next digit of our result is 2. 
Result so far: 1062.0
Deduct 1246 from 1386 and we're left with 140.
Grab the next digit (4) from the dividend, add it to 140, then carry on: 1404 / 623

Moving on to step 7:
If we divide 1404 by 623, we get 2 and a remainder of 158.
The number 2 becomes the next digit in our result. 
Result so far: 10622.0
Subtracting 1246 from 1404 leaves us with 158.
Fetch the next digit (4) from the dividend, attach it to 158 and continue: 1584 / 623

Going ahead to step 8:
When dividing 1584 by 623, we get 2 with a remainder of 338.
Put 2 as the next digit of the answer. 
Result so far: 106222.0
If we subtract 1246 from 1584, we get 338.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3380, and continue the process.

On to step 9:
623 can be fit into 3380 5 times, resulting in a remainder of 265.
Write down 5 as next digit of the result. 
Result so far: 106222.5
Deduct 3115 from 3380 and we're left with 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

Let's proceed to step 10:
The number 623 fits into 2650 4 times, leaving a remainder of 158.
Record the quotient 4 as the next digit in the result. 
Result so far: 106222.54
Deduct 2492 from 2650 and we're left with 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

Advancing to step 11:
1580 divided by 623 is 2 with a remainder of 334.
Write down 2 as next digit of the result. 
Result so far: 106222.542
Subtract 1246 from 1580 to get 334.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3340, and continue the process.

Step 12:
623 can be fit into 3340 5 times, resulting in a remainder of 225.
The next digit of our result is 5. 
Result so far: 106222.5425
Subtract 3115 from 3340 to get 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

On to step 13:
2250 divided by 623 is 3 with a remainder of 381.
Record the quotient 3 as the next digit in the result. 
Result so far: 106222.54253
Subtract 1869 from 2250 to get 381.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3810, and continue the process.

Step 14:
The number 623 fits into 3810 6 times, leaving a remainder of 72.
Use 6 as the next digit of our solution. 
Result so far: 106222.542536
The remainder is 72 after subtracting 3738 from 3810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Let's proceed to step 15:
The number 623 fits into 720 1 times, leaving a remainder of 97.
The next digit of our result is 1. 
Result so far: 106222.5425361
If we subtract 623 from 720, we get 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

Advancing to step 16:
970 divided by 623 is 1 with a remainder of 347.
The next digit of our result is 1. 
Result so far: 106222.54253611
If we take 623 away from 970, we end up with 347.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3470, and continue the process.

Our division results in 106222.54253611 with a remaining 3.47e-07.