We're dividing 74922656 by 645 
The aim is to understand the frequency of 645 in 74922656.

Step 1:
The number 645 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Take the next digit (4) from the dividend and append it to 7, then repeat: 74 / 645

Moving on to step 2:
645 can be fit into 74 0 times, resulting in a remainder of 74.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 74 leaves us with 74.
Include the next digit (9) from the dividend after 74, then repeat: 749 / 645

On to step 3:
The number 645 fits into 749 1 times, leaving a remainder of 104.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 104 after subtracting 645 from 749.
Bring next digit (2) of the dividend behind the 104 and repeat the process: 1042 / 645

On to step 4:
If we divide 1042 by 645, we get 1 and a remainder of 397.
Put 1 as the next digit of the answer. 
Result so far: 11.0
Deduct 645 from 1042 and we're left with 397.
Grab the next digit (2) from the dividend, add it to 397, then carry on: 3972 / 645

Let's proceed to step 5:
If we divide 3972 by 645, we get 6 and a remainder of 102.
Record the quotient 6 as the next digit in the result. 
Result so far: 116.0
The remainder is 102 after subtracting 3870 from 3972.
Include the next digit (6) from the dividend after 102, then repeat: 1026 / 645

Advancing to step 6:
1026 divided by 645 is 1 with a remainder of 381.
Write down 1 as next digit of the result. 
Result so far: 1161.0
Subtracting 645 from 1026 leaves us with 381.
Append the next digit (5) from the dividend to 381 and continue with: 3815 / 645

Going ahead to step 7:
645 can be fit into 3815 5 times, resulting in a remainder of 590.
Write down 5 as next digit of the result. 
Result so far: 11615.0
Deduct 3225 from 3815 and we're left with 590.
Grab the next digit (6) from the dividend, add it to 590, then carry on: 5906 / 645

Step 8:
If we divide 5906 by 645, we get 9 and a remainder of 101.
The next digit of our result is 9. 
Result so far: 116159.0
If we subtract 5805 from 5906, we get 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

Moving on to step 9:
When dividing 1010 by 645, we get 1 with a remainder of 365.
The next digit of our result is 1. 
Result so far: 116159.1
Subtracting 645 from 1010 leaves us with 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

On to step 10:
645 goes into 3650 5 times with a remainder of 425.
Use 5 as the next digit of our solution. 
Result so far: 116159.15
The remainder is 425 after subtracting 3225 from 3650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

Advancing to step 11:
645 goes into 4250 6 times with a remainder of 380.
Put 6 as the next digit of the answer. 
Result so far: 116159.156
Subtracting 3870 from 4250 leaves us with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Moving on to step 12:
645 goes into 3800 5 times with a remainder of 575.
The number 5 becomes the next digit in our result. 
Result so far: 116159.1565
Subtracting 3225 from 3800 leaves us with 575.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5750, and continue the process.

Let's proceed to step 13:
645 can be fit into 5750 8 times, resulting in a remainder of 590.
The next digit of our result is 8. 
Result so far: 116159.15658
Deduct 5160 from 5750 and we're left with 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Going ahead to step 14:
If we divide 5900 by 645, we get 9 and a remainder of 95.
Record the quotient 9 as the next digit in the result. 
Result so far: 116159.156589
Subtract 5805 from 5900 to get 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

On to step 15:
645 can be fit into 950 1 times, resulting in a remainder of 305.
The number 1 becomes the next digit in our result. 
Result so far: 116159.1565891
Subtract 645 from 950 to get 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

Moving on to step 16:
645 goes into 3050 4 times with a remainder of 470.
Use 4 as the next digit of our solution. 
Result so far: 116159.15658914
The remainder is 470 after subtracting 2580 from 3050.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

The quotient of the division is 116159.15658914, and the remainder is 4.7e-07.