We're dividing 91422688 by 669 
The aim is to understand the frequency of 669 in 91422688.

On to step 1:
9 divided by 669 is 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 669

Advancing to step 2:
669 goes into 91 0 times with a remainder of 91.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 91 and we're left with 91.
Take the next digit (4) from the dividend and append it to 91, then repeat: 914 / 669

Moving on to step 3:
When dividing 914 by 669, we get 1 with a remainder of 245.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 669 from 914 leaves us with 245.
Append the next digit (2) from the dividend to 245 and continue with: 2452 / 669

Moving on to step 4:
The number 669 fits into 2452 3 times, leaving a remainder of 445.
Use 3 as the next digit of our solution. 
Result so far: 13.0
Subtracting 2007 from 2452 leaves us with 445.
Fetch the next digit (2) from the dividend, attach it to 445 and continue: 4452 / 669

Advancing to step 5:
4452 divided by 669 is 6 with a remainder of 438.
Write down 6 as next digit of the result. 
Result so far: 136.0
Subtract 4014 from 4452 to get 438.
Fetch the next digit (6) from the dividend, attach it to 438 and continue: 4386 / 669

Going ahead to step 6:
When dividing 4386 by 669, we get 6 with a remainder of 372.
Write down 6 as next digit of the result. 
Result so far: 1366.0
If we subtract 4014 from 4386, we get 372.
Grab the next digit (8) from the dividend, add it to 372, then carry on: 3728 / 669

Advancing to step 7:
3728 divided by 669 is 5 with a remainder of 383.
Put 5 as the next digit of the answer. 
Result so far: 13665.0
Subtracting 3345 from 3728 leaves us with 383.
Grab the next digit (8) from the dividend, add it to 383, then carry on: 3838 / 669

On to step 8:
The number 669 fits into 3838 5 times, leaving a remainder of 493.
Write down 5 as next digit of the result. 
Result so far: 136655.0
The remainder is 493 after subtracting 3345 from 3838.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4930, and continue the process.

Going ahead to step 9:
If we divide 4930 by 669, we get 7 and a remainder of 247.
Use 7 as the next digit of our solution. 
Result so far: 136655.7
Subtract 4683 from 4930 to get 247.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

Moving on to step 10:
669 can be fit into 2470 3 times, resulting in a remainder of 463.
Record the quotient 3 as the next digit in the result. 
Result so far: 136655.73
Subtracting 2007 from 2470 leaves us with 463.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4630, and continue the process.

Step 11:
When dividing 4630 by 669, we get 6 with a remainder of 616.
Record the quotient 6 as the next digit in the result. 
Result so far: 136655.736
The remainder is 616 after subtracting 4014 from 4630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6160, and continue the process.

Let's proceed to step 12:
When dividing 6160 by 669, we get 9 with a remainder of 139.
Record the quotient 9 as the next digit in the result. 
Result so far: 136655.7369
The remainder is 139 after subtracting 6021 from 6160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1390, and continue the process.

Going ahead to step 13:
When dividing 1390 by 669, we get 2 with a remainder of 52.
The next digit of our result is 2. 
Result so far: 136655.73692
The remainder is 52 after subtracting 1338 from 1390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 14:
When dividing 520 by 669, we get 0 with a remainder of 520.
The number 0 becomes the next digit in our result. 
Result so far: 136655.73692
Subtracting 0 from 520 leaves us with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Step 15:
When dividing 5200 by 669, we get 7 with a remainder of 517.
Use 7 as the next digit of our solution. 
Result so far: 136655.7369207
If we take 4683 away from 5200, we end up with 517.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5170, and continue the process.

Step 16:
If we divide 5170 by 669, we get 7 and a remainder of 487.
Write down 7 as next digit of the result. 
Result so far: 136655.73692077
If we take 4683 away from 5170, we end up with 487.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4870, and continue the process.

In conclusion, the division gives 136655.73692077 with a balance of 4.87e-07.