421221 divided by 67 
The aim is to understand the frequency of 67 in 421221.

On to step 1:
67 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 67

Let's proceed to step 2:
If we divide 42 by 67, we get 0 and a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Grab the next digit (1) from the dividend, add it to 42, then carry on: 421 / 67

Moving on to step 3:
421 divided by 67 is 6 with a remainder of 19.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Subtracting 402 from 421 leaves us with 19.
Fetch the next digit (2) from the dividend, attach it to 19 and continue: 192 / 67

Let's proceed to step 4:
67 can be fit into 192 2 times, resulting in a remainder of 58.
Use 2 as the next digit of our solution. 
Result so far: 62.0
Deduct 134 from 192 and we're left with 58.
Take the next digit (2) from the dividend and append it to 58, then repeat: 582 / 67

Moving on to step 5:
582 divided by 67 is 8 with a remainder of 46.
The number 8 becomes the next digit in our result. 
Result so far: 628.0
If we subtract 536 from 582, we get 46.
Take the next digit (1) from the dividend and append it to 46, then repeat: 461 / 67

Advancing to step 6:
When dividing 461 by 67, we get 6 with a remainder of 59.
The number 6 becomes the next digit in our result. 
Result so far: 6286.0
If we take 402 away from 461, we end up with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Advancing to step 7:
67 can be fit into 590 8 times, resulting in a remainder of 54.
Record the quotient 8 as the next digit in the result. 
Result so far: 6286.8
If we subtract 536 from 590, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Advancing to step 8:
67 can be fit into 540 8 times, resulting in a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 6286.88
If we subtract 536 from 540, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The quotient of the division is 6286.88, and the remainder is 0.004.