We're dividing 19372891 by 668 
The aim is to understand the frequency of 668 in 19372891.

Advancing to step 1:
1 divided by 668 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 668

On to step 2:
19 divided by 668 is 0 with a remainder of 19.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 19 after subtracting 0 from 19.
Bring next digit (3) of the dividend behind the 19 and repeat the process: 193 / 668

Going ahead to step 3:
193 divided by 668 is 0 with a remainder of 193.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 193, we get 193.
Grab the next digit (7) from the dividend, add it to 193, then carry on: 1937 / 668

Step 4:
If we divide 1937 by 668, we get 2 and a remainder of 601.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 1336 from 1937 leaves us with 601.
Take the next digit (2) from the dividend and append it to 601, then repeat: 6012 / 668

Going ahead to step 5:
668 can be fit into 6012 9 times, resulting in a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 29.0
Subtract 6012 from 6012 to get 0.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 668

On to step 6:
8 divided by 668 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 290.0
If we subtract 0 from 8, we get 8.
Bring next digit (9) of the dividend behind the 8 and repeat the process: 89 / 668

Step 7:
If we divide 89 by 668, we get 0 and a remainder of 89.
Write down 0 as next digit of the result. 
Result so far: 2900.0
If we take 0 away from 89, we end up with 89.
Take the next digit (1) from the dividend and append it to 89, then repeat: 891 / 668

On to step 8:
668 goes into 891 1 times with a remainder of 223.
Record the quotient 1 as the next digit in the result. 
Result so far: 29001.0
Deduct 668 from 891 and we're left with 223.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2230, and continue the process.

Let's proceed to step 9:
668 goes into 2230 3 times with a remainder of 226.
The next digit of our result is 3. 
Result so far: 29001.3
Deduct 2004 from 2230 and we're left with 226.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2260, and continue the process.

Let's proceed to step 10:
When dividing 2260 by 668, we get 3 with a remainder of 256.
Use 3 as the next digit of our solution. 
Result so far: 29001.33
If we take 2004 away from 2260, we end up with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

The quotient of the division is 29001.33, and the remainder is 0.256.