770586 ÷ 45 
The aim is to understand the frequency of 45 in 770586.

On to step 1:
The number 45 fits into 7 0 times, leaving a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 45

Step 2:
45 can be fit into 77 1 times, resulting in a remainder of 32.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 45 away from 77, we end up with 32.
Take the next digit (0) from the dividend and append it to 32, then repeat: 320 / 45

Moving on to step 3:
When dividing 320 by 45, we get 7 with a remainder of 5.
Put 7 as the next digit of the answer. 
Result so far: 17.0
The remainder is 5 after subtracting 315 from 320.
Take the next digit (5) from the dividend and append it to 5, then repeat: 55 / 45

Let's proceed to step 4:
When dividing 55 by 45, we get 1 with a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 171.0
Deduct 45 from 55 and we're left with 10.
Bring next digit (8) of the dividend behind the 10 and repeat the process: 108 / 45

Step 5:
45 goes into 108 2 times with a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 1712.0
If we subtract 90 from 108, we get 18.
Include the next digit (6) from the dividend after 18, then repeat: 186 / 45

Let's proceed to step 6:
186 divided by 45 is 4 with a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 17124.0
If we take 180 away from 186, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 7:
If we divide 60 by 45, we get 1 and a remainder of 15.
Put 1 as the next digit of the answer. 
Result so far: 17124.1
If we subtract 45 from 60, 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 8:
When dividing 150 by 45, we get 3 with a remainder of 15.
The number 3 becomes the next digit in our result. 
Result so far: 17124.13
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:
When dividing 150 by 45, we get 3 with a remainder of 15.
Record the quotient 3 as the next digit in the result. 
Result so far: 17124.133
Subtract 135 from 150 to 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.

Our division results in 17124.133 with a remaining 0.0015.