We look at the division of 835719 by 45 
The aim is to understand the frequency of 45 in 835719.

On to step 1:
45 goes into 8 0 times with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (3) from the dividend, attach it to 8 and continue: 83 / 45

Moving on to step 2:
If we divide 83 by 45, we get 1 and a remainder of 38.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 45 from 83 to get 38.
Bring next digit (5) of the dividend behind the 38 and repeat the process: 385 / 45

Step 3:
When dividing 385 by 45, we get 8 with a remainder of 25.
The next digit of our result is 8. 
Result so far: 18.0
The remainder is 25 after subtracting 360 from 385.
Append the next digit (7) from the dividend to 25 and continue with: 257 / 45

On to step 4:
45 can be fit into 257 5 times, resulting in a remainder of 32.
Record the quotient 5 as the next digit in the result. 
Result so far: 185.0
Deduct 225 from 257 and we're left with 32.
Bring next digit (1) of the dividend behind the 32 and repeat the process: 321 / 45

On to step 5:
If we divide 321 by 45, we get 7 and a remainder of 6.
Record the quotient 7 as the next digit in the result. 
Result so far: 1857.0
Deduct 315 from 321 and we're left with 6.
Bring next digit (9) of the dividend behind the 6 and repeat the process: 69 / 45

Going ahead to step 6:
When dividing 69 by 45, we get 1 with a remainder of 24.
Write down 1 as next digit of the result. 
Result so far: 18571.0
Deduct 45 from 69 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 7:
The number 45 fits into 240 5 times, leaving a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 18571.5
If we take 225 away from 240, we end up 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.

Going ahead to step 8:
150 divided by 45 is 3 with a remainder of 15.
Put 3 as the next digit of the answer. 
Result so far: 18571.53
The remainder is 15 after subtracting 135 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 9:
If we divide 150 by 45, we get 3 and a remainder of 15.
Record the quotient 3 as the next digit in the result. 
Result so far: 18571.533
Deduct 135 from 150 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 18571.533, and the remainder is 0.0015.