213045 ÷ 7 
The aim is to understand the frequency of 7 in 213045.

Moving on to step 1:
When dividing 2 by 7, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 7

Moving on to step 2:
If we divide 21 by 7, we get 3 and a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 21 from 21 to get 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 7

Step 3:
If we divide 3 by 7, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 30.0
Subtract 0 from 3 to get 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 7

Moving on to step 4:
30 divided by 7 is 4 with a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 304.0
The remainder is 2 after subtracting 28 from 30.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 7

Going ahead to step 5:
When dividing 24 by 7, we get 3 with a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 3043.0
If we subtract 21 from 24, we get 3.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 7

Step 6:
35 divided by 7 is 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 30435.0
Subtracting 35 from 35 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 7:
When dividing 0 by 7, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 30435.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 8:
7 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 30435.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 30435.0 with a remaining 0.0.