We look at the division of 46394868 by 645 
The aim is to understand the frequency of 645 in 46394868.

Advancing to step 1:
645 goes into 4 0 times with 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 (6) from the dividend, attach it to 4 and continue: 46 / 645

Let's proceed to step 2:
46 divided by 645 is 0 with a remainder of 46.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 46 to get 46.
Bring next digit (3) of the dividend behind the 46 and repeat the process: 463 / 645

Moving on to step 3:
463 divided by 645 is 0 with a remainder of 463.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 463 and we're left with 463.
Take the next digit (9) from the dividend and append it to 463, then repeat: 4639 / 645

Moving on to step 4:
645 can be fit into 4639 7 times, resulting in a remainder of 124.
Write down 7 as next digit of the result. 
Result so far: 7.0
Deduct 4515 from 4639 and we're left with 124.
Append the next digit (4) from the dividend to 124 and continue with: 1244 / 645

Step 5:
If we divide 1244 by 645, we get 1 and a remainder of 599.
The number 1 becomes the next digit in our result. 
Result so far: 71.0
If we subtract 645 from 1244, we get 599.
Grab the next digit (8) from the dividend, add it to 599, then carry on: 5998 / 645

On to step 6:
If we divide 5998 by 645, we get 9 and a remainder of 193.
Put 9 as the next digit of the answer. 
Result so far: 719.0
Subtracting 5805 from 5998 leaves us with 193.
Take the next digit (6) from the dividend and append it to 193, then repeat: 1936 / 645

Advancing to step 7:
645 goes into 1936 3 times with a remainder of 1.
The next digit of our result is 3. 
Result so far: 7193.0
If we take 1935 away from 1936, we end up with 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 645

Step 8:
18 divided by 645 is 0 with a remainder of 18.
Put 0 as the next digit of the answer. 
Result so far: 71930.0
Deduct 0 from 18 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 9:
If we divide 180 by 645, we get 0 and a remainder of 180.
Use 0 as the next digit of our solution. 
Result so far: 71930.0
Subtract 0 from 180 to get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Step 10:
645 goes into 1800 2 times with a remainder of 510.
Record the quotient 2 as the next digit in the result. 
Result so far: 71930.02
Subtract 1290 from 1800 to get 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Going ahead to step 11:
645 goes into 5100 7 times with a remainder of 585.
Put 7 as the next digit of the answer. 
Result so far: 71930.027
The remainder is 585 after subtracting 4515 from 5100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5850, and continue the process.

Going ahead to step 12:
The number 645 fits into 5850 9 times, leaving a remainder of 45.
The next digit of our result is 9. 
Result so far: 71930.0279
Subtract 5805 from 5850 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Let's proceed to step 13:
When dividing 450 by 645, we get 0 with a remainder of 450.
Write down 0 as next digit of the result. 
Result so far: 71930.0279
If we take 0 away from 450, we end up with 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Step 14:
4500 divided by 645 is 6 with a remainder of 630.
The number 6 becomes the next digit in our result. 
Result so far: 71930.027906
Subtracting 3870 from 4500 leaves us with 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6300, and continue the process.

Advancing to step 15:
645 can be fit into 6300 9 times, resulting in a remainder of 495.
The number 9 becomes the next digit in our result. 
Result so far: 71930.0279069
If we subtract 5805 from 6300, we get 495.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4950, and continue the process.

Let's proceed to step 16:
The number 645 fits into 4950 7 times, leaving a remainder of 435.
The next digit of our result is 7. 
Result so far: 71930.02790697
Subtract 4515 from 4950 to get 435.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4350, and continue the process.

In conclusion, the division gives 71930.02790697 with a balance of 4.35e-07.