76862625 ÷ 645 
The aim is to understand the frequency of 645 in 76862625.

Let's proceed to step 1:
645 can be fit into 7 0 times, resulting in a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Include the next digit (6) from the dividend after 7, then repeat: 76 / 645

Advancing to step 2:
76 divided by 645 is 0 with a remainder of 76.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 76 leaves us with 76.
Bring next digit (8) of the dividend behind the 76 and repeat the process: 768 / 645

Let's proceed to step 3:
When dividing 768 by 645, we get 1 with a remainder of 123.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 645 from 768 to get 123.
Include the next digit (6) from the dividend after 123, then repeat: 1236 / 645

Let's proceed to step 4:
645 goes into 1236 1 times with a remainder of 591.
Put 1 as the next digit of the answer. 
Result so far: 11.0
If we take 645 away from 1236, we end up with 591.
Grab the next digit (2) from the dividend, add it to 591, then carry on: 5912 / 645

Let's proceed to step 5:
The number 645 fits into 5912 9 times, leaving a remainder of 107.
Record the quotient 9 as the next digit in the result. 
Result so far: 119.0
If we take 5805 away from 5912, we end up with 107.
Append the next digit (6) from the dividend to 107 and continue with: 1076 / 645

Moving on to step 6:
645 goes into 1076 1 times with a remainder of 431.
Put 1 as the next digit of the answer. 
Result so far: 1191.0
If we take 645 away from 1076, we end up with 431.
Fetch the next digit (2) from the dividend, attach it to 431 and continue: 4312 / 645

Moving on to step 7:
If we divide 4312 by 645, we get 6 and a remainder of 442.
The next digit of our result is 6. 
Result so far: 11916.0
The remainder is 442 after subtracting 3870 from 4312.
Append the next digit (5) from the dividend to 442 and continue with: 4425 / 645

Going ahead to step 8:
645 goes into 4425 6 times with a remainder of 555.
The number 6 becomes the next digit in our result. 
Result so far: 119166.0
Subtracting 3870 from 4425 leaves us with 555.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5550, and continue the process.

Going ahead to step 9:
645 can be fit into 5550 8 times, resulting in a remainder of 390.
Write down 8 as next digit of the result. 
Result so far: 119166.8
If we subtract 5160 from 5550, we get 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Let's proceed to step 10:
645 goes into 3900 6 times with a remainder of 30.
Write down 6 as next digit of the result. 
Result so far: 119166.86
If we subtract 3870 from 3900, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 11:
645 can be fit into 300 0 times, resulting in a remainder of 300.
Put 0 as the next digit of the answer. 
Result so far: 119166.86
Deduct 0 from 300 and we're left with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

On to step 12:
When dividing 3000 by 645, we get 4 with a remainder of 420.
Write down 4 as next digit of the result. 
Result so far: 119166.8604
If we take 2580 away from 3000, we end up with 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Moving on to step 13:
If we divide 4200 by 645, we get 6 and a remainder of 330.
The number 6 becomes the next digit in our result. 
Result so far: 119166.86046
Subtract 3870 from 4200 to get 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

On to step 14:
645 goes into 3300 5 times with a remainder of 75.
The number 5 becomes the next digit in our result. 
Result so far: 119166.860465
Deduct 3225 from 3300 and we're left with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

On to step 15:
If we divide 750 by 645, we get 1 and a remainder of 105.
The number 1 becomes the next digit in our result. 
Result so far: 119166.8604651
If we take 645 away from 750, we end up with 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Step 16:
645 can be fit into 1050 1 times, resulting in a remainder of 405.
Write down 1 as next digit of the result. 
Result so far: 119166.86046511
Deduct 645 from 1050 and we're left with 405.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4050, and continue the process.

Our division results in 119166.86046511 with a remaining 4.05e-07.