45978669 ÷ 668 
The aim is to understand the frequency of 668 in 45978669.

Step 1:
The number 668 fits into 4 0 times, leaving a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 668

Step 2:
668 can be fit into 45 0 times, resulting in a remainder of 45.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 45, we get 45.
Bring next digit (9) of the dividend behind the 45 and repeat the process: 459 / 668

Moving on to step 3:
459 divided by 668 is 0 with a remainder of 459.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 459 and we're left with 459.
Take the next digit (7) from the dividend and append it to 459, then repeat: 4597 / 668

Going ahead to step 4:
The number 668 fits into 4597 6 times, leaving a remainder of 589.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Subtracting 4008 from 4597 leaves us with 589.
Append the next digit (8) from the dividend to 589 and continue with: 5898 / 668

Moving on to step 5:
668 can be fit into 5898 8 times, resulting in a remainder of 554.
Put 8 as the next digit of the answer. 
Result so far: 68.0
If we take 5344 away from 5898, we end up with 554.
Include the next digit (6) from the dividend after 554, then repeat: 5546 / 668

Advancing to step 6:
5546 divided by 668 is 8 with a remainder of 202.
Record the quotient 8 as the next digit in the result. 
Result so far: 688.0
Deduct 5344 from 5546 and we're left with 202.
Bring next digit (6) of the dividend behind the 202 and repeat the process: 2026 / 668

Going ahead to step 7:
2026 divided by 668 is 3 with a remainder of 22.
Record the quotient 3 as the next digit in the result. 
Result so far: 6883.0
If we subtract 2004 from 2026, we get 22.
Append the next digit (9) from the dividend to 22 and continue with: 229 / 668

Advancing to step 8:
If we divide 229 by 668, we get 0 and a remainder of 229.
Record the quotient 0 as the next digit in the result. 
Result so far: 68830.0
Subtract 0 from 229 to get 229.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2290, and continue the process.

Moving on to step 9:
If we divide 2290 by 668, we get 3 and a remainder of 286.
Record the quotient 3 as the next digit in the result. 
Result so far: 68830.3
If we subtract 2004 from 2290, we get 286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

Advancing to step 10:
If we divide 2860 by 668, we get 4 and a remainder of 188.
The number 4 becomes the next digit in our result. 
Result so far: 68830.34
Subtract 2672 from 2860 to get 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

Let's proceed to step 11:
When dividing 1880 by 668, we get 2 with a remainder of 544.
The next digit of our result is 2. 
Result so far: 68830.342
Subtract 1336 from 1880 to get 544.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5440, and continue the process.

Moving on to step 12:
5440 divided by 668 is 8 with a remainder of 96.
The next digit of our result is 8. 
Result so far: 68830.3428
Subtract 5344 from 5440 to get 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Going ahead to step 13:
If we divide 960 by 668, we get 1 and a remainder of 292.
The number 1 becomes the next digit in our result. 
Result so far: 68830.34281
Subtract 668 from 960 to get 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Moving on to step 14:
668 can be fit into 2920 4 times, resulting in a remainder of 248.
Put 4 as the next digit of the answer. 
Result so far: 68830.342814
The remainder is 248 after subtracting 2672 from 2920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Moving on to step 15:
If we divide 2480 by 668, we get 3 and a remainder of 476.
The next digit of our result is 3. 
Result so far: 68830.3428143
Subtract 2004 from 2480 to get 476.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4760, and continue the process.

Moving on to step 16:
The number 668 fits into 4760 7 times, leaving a remainder of 84.
Put 7 as the next digit of the answer. 
Result so far: 68830.34281437
If we subtract 4676 from 4760, we get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Our division results in 68830.34281437 with a remaining 8.4e-08.