We're dividing 644851 by 35 
The aim is to understand the frequency of 35 in 644851.

On to step 1:
When dividing 6 by 35, we get 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 35

Going ahead to step 2:
35 goes into 64 1 times with a remainder of 29.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 35 from 64, we get 29.
Bring next digit (4) of the dividend behind the 29 and repeat the process: 294 / 35

Moving on to step 3:
When dividing 294 by 35, we get 8 with a remainder of 14.
Put 8 as the next digit of the answer. 
Result so far: 18.0
If we subtract 280 from 294, we get 14.
Append the next digit (8) from the dividend to 14 and continue with: 148 / 35

Let's proceed to step 4:
The number 35 fits into 148 4 times, leaving a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 184.0
Subtracting 140 from 148 leaves us with 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 35

Advancing to step 5:
The number 35 fits into 85 2 times, leaving a remainder of 15.
Use 2 as the next digit of our solution. 
Result so far: 1842.0
The remainder is 15 after subtracting 70 from 85.
Fetch the next digit (1) from the dividend, attach it to 15 and continue: 151 / 35

Step 6:
35 can be fit into 151 4 times, resulting in a remainder of 11.
The number 4 becomes the next digit in our result. 
Result so far: 18424.0
Subtract 140 from 151 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 7:
35 can be fit into 110 3 times, resulting in a remainder of 5.
Use 3 as the next digit of our solution. 
Result so far: 18424.3
If we take 105 away from 110, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 8:
35 goes into 50 1 times with a remainder of 15.
Record the quotient 1 as the next digit in the result. 
Result so far: 18424.31
If we subtract 35 from 50, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 9:
35 goes into 150 4 times with a remainder of 10.
The number 4 becomes the next digit in our result. 
Result so far: 18424.314
Deduct 140 from 150 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 10:
35 goes into 100 2 times with a remainder of 30.
Put 2 as the next digit of the answer. 
Result so far: 18424.3142
Subtract 70 from 100 to 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.

Advancing to step 11:
35 goes into 300 8 times with a remainder of 20.
Use 8 as the next digit of our solution. 
Result so far: 18424.31428
Subtracting 280 from 300 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 12:
If we divide 200 by 35, we get 5 and a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 18424.314285
Subtract 175 from 200 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 13:
35 goes into 250 7 times with a remainder of 5.
The number 7 becomes the next digit in our result. 
Result so far: 18424.3142857
Deduct 245 from 250 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 14:
If we divide 50 by 35, we get 1 and a remainder of 15.
The next digit of our result is 1. 
Result so far: 18424.31428571
Deduct 35 from 50 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The quotient of the division is 18424.31428571, and the remainder is 1.5e-08.